Josephine Sesay, 32, carries a deceased 7-month old baby from Race Course area, after she died in Freetown, Sierra Leone, on Sunday, November 23, 2014. Sesay, a mother of two children usually collects swabs to test for Ebola but wanted to carry the baby out to the hearse. (Photo by Nikki Kahn/The Washington Post)

Family members mourn the death of 12-year-old Isata Kallon in Freetown, Sierra Leone, as Ebola cases continue to rise on Sunday, November 23, 2014. Swabs are taken from the deceased to test for Ebola and all burials in Sierra Leone adhere to strict rules to prevent the spread of the disease. (Photo by Nikki Kahn/The Washington Post)

A novice Buddhist monk walks across a railway track collecting alms following a cleric's rule of no footwear nor use of umbrellas at a railway station in Yangon, Myanmar, Wednesday, November 26, 2014. (Photo by Gemunu Amarasinghe/AP Photo)

In this photo released by Rio 2016 Organizing Committee for the Olympic and Paralympic Games, the mascots of Rio 2016 Olympic, left, and Paralympic Games pose for a photo at the Leme Fort, with Copabana beach, left, in the background, in Rio de Janeiro, Brazil, Sunday, November 23, 2014. The Mascots are inspired by the Brazilian fauna and flora. (Photo by Alex Ferro/AP Photo/Rio 2016)

This August 15, 2012, photo provided The Lowline shows the abandoned trolley terminal deep underground in New York's Lower East Side, which may one day house a park. The project-in-the-works, history meets 21st century technology; will employ the latest solar technology to illuminate the subterranean space, filtering the sun via a collector at street level. (Photo by Danny Fuchs/AP Photo/The Lowline)

This undated artist's rendering provided by The Lowline shows a deep underground park that could be created in a 116-year-old abandoned trolley terminal below the Lower East Side. For this project-in-the-works, the latest solar technology will illuminate the subterranean space, filtering the sun via a collector at street level. (AP Photo/The Lowline)

In this September 23, 2014 file photo, James Rylands, Auctioneer and Director of Summers Place Auctions, prepares the skeleton of an Ice Age woolly mammoth in London. The 5.5-meter-long skeleton made up of more than 150 bones lay in pieces for decades but was reassembled for display at an auction house in Billingshurst, southern England. Complete with curved tusks, it is thought to be from a male of the now extinct species, which may have weighed up to 6 tons in its lifetime, up to 50,000 years ago. A Summers Place spokesman said the fur-covered mammoth would have roamed the steppe stretching across Northern Eurasia and North America. The species has been extinct for around 10,000 years. The skeleton has been bought by a private buyer for 189,000 pounds ($300,000, €239.000) at an auction in London on Wednesday November 26, 2014. (Photo by Gareth Fuller/AP Photo/PA Wire)

French President Francois Hollande is welcomed as he arrives for a dinner with representatives from the French Overseas Territories, at the City Hall, in Paris, France on November 21, 2014. (Photo by by Pierre Villard/Sipa USA)

In this Tuesday, November 25, 2014 photo, U.S. scientist Joshua Apte monitors pollution levels on his laptop as he travels in an open-aired auto-rickshaw during rush-hour traffic in New Delhi, India. Apte has alarming findings for anyone who spends time on or near the roads in this city of 25 million, with numbers far worse than the ones that have already led the World Health Organization to rank New Delhi as the world's most polluted city. Average pollution levels, depending on the pollutant, were 50 percent to 8 times higher on the road than urban background readings, including official ambient air pollution measures, according to research by Apte and his partners at the University of California, Berkeley, and the Indian Institute of Technology in New Delhi. (Photo by Altaf Qadri/AP Photo)

In this photo taken Thursday, November 20, 2014, Shirin Vala, 65, who is an essential tremor patient, uses a Liftware Spoon to eat without spilling at her home in Oakland, Calif. Just in time for the holidays, Google is throwing it's money, brain power and technology at the humble spoon. Not surprisingly, the company that has brought the driverless car and Internet glasses is bringing a unique improvement to the utensils. Built with hundreds of algorithms, these specially designed spoons make it much easier for people with tremors and Parkinson'fs Disease to eat without spilling. The spoons sense a shaking hand and make instant adjustments to stay balanced. (Photo by Eric Risberg/AP Photo)

A Russian orthodox priest blesses a SU-27 SM fighter jet on the airfield of Belbek military airport outside Sevastopol on November 26, 2014. Crimean military air forces were reinforced by ten Russian SU-27 SM and four SU-30 fighter jets today. NATO's top military commander warned Wednesday that Russia's “militarisation” of the annexed Crimea peninsula could be used by Moscow to exert control across the whole Black Sea region. (Photo by Yuri Lashov/AFP Photo)

A person points on November 27, 2014 to a 23,000 year-old chalk statue of a woman, which was found in July outside the northern French city of Amiens. Called the “Venus of Renancourt”, the statue was found at the paleolithic site of Renancourt, west of Amiens. About 12 centimeters (4.7 inches) high, it shows a woman with big breasts and buttocks. The head and arms are less detailed. Around 100 such figures have been found in Europe, mostly in Russia and central Europe, including around 15 in France, most of them discovered in the southwest. (Photo by Denis Charlet/AFP Photo)

People walk along an alley of plane trees in Frankfurt, Germany, Monday, November 24, 2014. (Photo by Michael Probst/AP Photo)

A Pakistani farmer guides his bulls as he competes in a traditional bull race in the northern Rawat village, 40 kilometers north of Pakistani capital city Islamabad on November 25, 2014. Around 200 bulls participated in the traditional race organized on a 400-meters length field where the farmers competed to be the fastest racer to reach the finish line in order to win the monetary award. (Photo by Metin Aktas/Getty Images/Anadolu Agency)

A National Police officer slips while trying to kick a burning tire at a barricade set up by protesters demanding the resignation of President Michel Martelly, in Port-au-Prince, Haiti, Friday, November 28, 2014. (Photo by Dieu Nalio Chery/AP Photo)

An Indian man sleeps on a cart as traffic moves past him in Kolkata, India, Thursday, November 27, 2014. Outdoor air pollution kills millions worldwide every year, according to the WHO, including more than 627,000 in India. (Photo by Bikas Das/AP Photo)

In this November 26, 2014 photo, volcanic smoke billows from Mount Aso, Kumamoto prefecture, on the southern Japanese main island of Kyushu. The volcano is blasting out chunks of magma in the first such eruption in 22 years, causing flight cancellations and prompting warnings to stay away from its crater. The Japan Meteorological Agency said Friday, November 28 that Mount Aso had spewed out lava debris and smoke, shooting plumes of ash a kilometer (3,280 feet) into the sky. The observatory does not expect the eruption to increase in scale. (Photo by AP Photo/Kyodo News)

Mascot “Leo” of Braunschweig's city cleaning day event pulls two rubbish bins at the christmas market in Braunschweig, central Germany, on November 27, 2014. Visitors of the christmas market can change plastic bags to multi-use bags at the mascot. (Photo by Ole Spata/AFP Photo/DPA)

Principal Lori Kuntz applies lipstick before kissing a piglet at Stewart Elementary School in Stevensville, Mich., on Tuesday, November 25, 2014. Students and staff celebrated raising $11,210 that will be used for PTO activities throughout the year. Kuntz promised to kiss a pig if the fundraising goal of $10,000 was met by Halloween. (Photo by Don Campbell/AP Photo/The Herald-Palladium)

Mt. Ontake is covered with snow and the mountain lodges are frozen with ice on the peak, straddling Nagano and Gifu Prefectures on November 27, 2014, two months after the 3, 067 meter-high mountain erupted. The eruption was the nation's worst volcanic disaster since the end of the World War – in terms of casualities, with 57 people confirmed dead. The search for six missing people discontinued due to snowfall. (Photo by The Yomiuri Shimbun via AP Images)

Rachael Bush a first grader at Pashley Elementary reacts to corn bread that was being served at a Thanksgiving feast at the school Tuesday morning, November 25, 2014, in Schenectady, N.Y. (Photo by Marc Schultz/AP Photo/The Daily Gazette)

Palestinian artist Amna Al-Salmi tries to paint a scene at the Gaza seaport during a windy day in Gaza City on November 24, 2014. UN peace envoy Robert Serry announced in early November that the temporary reconstruction mechanism for the war-torn Palestinian territory had begun operations, under the auspices of the newly formed Palestinian unity government, noting the urgency in providing cement and other materials to tens of thousands of damaged homes in Gaza ahead of winter. (Photo by Mohammed Abed/AFP Photo)

Workers repair a gas pipeline damaged during shelling between Ukrainian forces and pro-Russian militants in eastern Ukrainian village Krasnyi Pakhar, in the Donetsk region on November 23, 2014. (Photo by Alexander Khudoteply/AFP Photo)

People walk next to a wrecked car near a river on November 28, 2014 in La Londe-les-Maures, southeastern France, after a violent storm which caused floods, damages and three deaths. The car is believed to have belonged to one of the victims. Three people are reported to have died in storms which have hit southeast France, and two are still reported missing. (Photo by Bertrand Langlois/AFP Photo)

People watch fish in newly opened Africanarium zoo in Wroclaw , Poland, Tuesday, November 18, 2014., an oceanarium complex presenting various ecosystems connected with water environment of Africa. (Photo by Czarek Sokolowski/AP Photo)

Undated handout photo issued by Crossrail of the Crossrail development of Bond Street platform in London, as more than 23 miles (nearly 90%) of train tunnels are now complete, with tunnelling due to finish in spring next year. Six of Crossrail's eight tunnelling machines have now completed their drives.(Photo by Crossrail/PA Wire)

Ranger trainees and trainee dogs simulate an ambush against rhino poachers at the Paramount Group Anti-Poaching training and K9 (canine) academy on November 26, 2014 in Magaliesberg, South Africa. One of the largest of its kind in Africa, the Academy will address the ever increasing need for training of Conservation Officers in anti poaching activities, wildlife contraband detection, specialist K9 solutions and Ranger K9 handler training – all of which have proven success rates in combatting and apprehending poachers and their activities. The centre has been established to provide comprehensive training solutions to assist in curbing the current surge in rhino and elephant poaching. These solutions include specialised anti-poaching reaction unit training, training of handlers and detection dogs at points of access to game reserves and borders, tracking dogs for field rangers, and training special operation dogs for rapid deployment teams, among others. (Photo by Gianluigi Guercia/AFP Photo)

Swiss mountain sports specialist Mammut is opening up new horizons on the Matterhorn with it's “Project360” taking digital mapping into a new dimension by bringing a virtual climbing experience to the public of one of the highest mountains in the Swiss Alp. Mammut professional climbers David Fasel and Stephan Siegrist each carried specially designed backpacks equipped with six cameras to capture the 360 degree panoramic view while scaling the legendary mountain and the results of their efforts can be viewed at project360.matterhorn.ch. David Fasel, who has climbed the Matterhorn over 200 times is just below the summit. Many other exciting peaks are still to follow. (Photo by Stephan Siegrist/Mammut/Photopress via AP Images)

Matt Hopcraft competes in the novice division of the caber toss as contestants flip a 14' 80-90 lb. pole for accuracy. The pole must make a complete flip and the closer to perpendicular the better the score. Lannadoo, is the second annual Celtic festival at the SeaWalk Pavilion in Jacksonville Beach, Fla., on Sunday November 23, 2014. The weekend-long festival showcased the best of the Celtic nations through culture, music and heritage. Lannadoo offered Celtic entertainment, authentic food options, 50+ vendors from across the country, kid zone, music, a 5k Kilt Run and the always-impressive Highland Games on the beach. (Photo by Bob Mack/AP Photo/The Florida Times-Union)

A car is carried away by flood waters November 23, 2014 in the southern region of Ouarzazate in Morocco. At least eight people were killed and 24 were missing as heavy storms lashed southern Morocco, causing flash floods, the authorities said. Flash floods are common in Morocco, where four children drowned in the south in September when they were swept away. (Photo by AFP Photo)

A couple walk along the Enchanted Christmas illuminated trail at Westonbirt Arboretum in Gloucestershire, UK on November 26, 2014, which opens officially on Friday November 28th. Visitors to the attraction will find a host of sound and light exhibits to interact with, including a tree that will illuminate in response to someone singing to it, a bike powered display, mirrorballs and smoke effects. (Photo by Ben Birchall/PA Wire)

People walk along the Enchanted Christmas illuminated trail at Westonbirt Arboretum in Gloucestershire, which opens officially on Friday November 28th. (Photo by Ben Birchall/PA Wire)

In this November 22, 2014 photo, Dr. Joe Wallace, right, uses a pressure washer to cut years of algae growth off the Eye Spy statues at Silver Springs State Park in Ocala, Fla. The newly formed Silver Springs professional dive team made its first dive to clean the bottom of the park's glass-bottom boats and pressure wash years of algae from iconic statues left behind from a production of the television series “I Spy” during the 1960s. (Photo by Alan Youngblood/AP Photo/The Ocala Star-Banner)