Miss Switzerland 2014 Laetitia Guarino reacts after she won the Miss Switzerland beauty pageant on the Federal Square in Bern October 11, 2014. (Photo by Ruben Sprich/Reuters)

A boy watches as a U.S. Marine MV-22 Osprey tiltrotor departs the site of an Ebola treatment center under construction on October 15, 2014 in Tubmanburg, Liberia. The center is the first of 17 Ebola treatment centers being built by Liberian forces under American supervision as part of Operation United Assistance to combat the Ebola epidemic. (Photo by John Moore/Getty Images)

Boys run from the blowing dust as a U.S. Marine MV-22 Osprey tiltrotor departs the site of an Ebola treatment center under construction on October 15, 2014 in Tubmanburg, Liberia. The center is the first of 17 Ebola treatment centers being built by Liberian forces under American supervision as part of Operation United Assistance to combat the Ebola epidemic. (Photo by John Moore/Getty Images)

A couple, running late for their wedding ceremony due to the occupation of the main roads by pro-democracy protesters, run towards the marriage registry, in the central business district of Hong Kong Tuesday, October 14, 2014. Hong Kong police removed some barricades on Tuesday from the edge of pro-democracy protest zones that have choked off roads for weeks, the second straight day they have taken such action and signaling their growing impatience with the student-led demonstrators. (Photo by Vincent Yu/AP Photo)

A wedding couple speak to police officers as they try to leave the area of a pro-democracy protest in the Admiralty district of Hong Kong on October 14, 2014. (Photo by Pedro Ugarte/AFP Photo)

An Occupy Central protester walks past tents before sunrise on a main road leading to the financial Central district in Hong Kong October 16, 2014. Hong Kong police used pepper spray early on Thursday to stop pro-democracy protesters from blocking a major road near the office of the city's embattled leader amid public anger over the police beating of a protester a day earlier. (Photo by Tyrone Siu/Reuters)

A mural called Art Buff created by street artist Banksy which has been vandalised this weekend in Folkestone, Kent, on October 12, 2014. (Photo by Gareth Fuller/PA Wire)

Pro-Russian rebels ride atop a car to their positions not far from the Donetsk Sergey Prokofiev International Airport in the city of Donetsk, eastern Ukraine, Tuesday, October 14, 2014. (Photo by Dmitry Lovetsky/AP Photo)

Pro-Russian rebels fire artillery toward Ukrainian position at Donetsk Sergey Prokofiev International Airport outskirts the city of Donetsk, eastern Ukraine Tuesday, October 14, 2014. (Photo by Dmitry Lovetsky/AP Photo)

Models display creations by Portuguese jewelry designer Olga Noronha during the ModaLisboa fashion week, in Lisbon, Portugal, Friday, October 10, 2014. (Photo by Francisco Seco/AP Photo)

Artist Raik Dalgas stands by his anti-war sculpture on the banks of the Goitzsche in Bitterfeld-Wolfen, Germany, 15 October 2014. His rusty work, which is nine and half meter long and weighs one tonne, is in the form of a historic war plane. A sculpture park will be erected by the lake in the coming year. (Photo by Jan Woitas/EPA)

Vice President Joe Biden tours a dredging barge, Thursday, October 16, 2014, at Penn's Landing along the Delaware River in Philadelphia. Biden discussed the importance of investing in the nation's infrastructure during his visit to the waterfront. (Photo by Matt Rourke/AP Photo)

France's Karim Benzema (L) challenges Portugal's Bruno Alves (R) during their friendly soccer match at the Stade de France in Saint-Denis near Paris, October 11, 2014. (Photo by Benoit Tessier/Reuters)

View of the Copahue volcano covered by clouds on October 12, 2014 from Caviahue, Neuquen, Argentina. The dark spot among the clouds is vapor and gases. (Photo by Francisco Negroni/AFP Photo)

A vendor sells Turkish traditional bagels called “simit”, as people watch the Syrian town of Kobani from near the Mursitpinar border crossing on October 13, 2014 on the Turkish-Syrian border in the southeastern town of Suruc, Sanliurfa province, Turkey. The strategic border town of Kobani has been beseiged by Islamic State militants since mid-September forcing more than 200,000 people to flee into Turkey. (Photo by Gokhan Sahin/Getty Images)

Laureus Academy Member Alexey Nemov and Laureus Ambassador Li XiaoPeng perform with a child at Oriental Pearl Tower on October 17, 2014 in Shanghai, China. (Photo by Kevin Lee/Getty Images for Laureus)

Tom McGuire stands next to the compact fusion reactor experiment inside his lab at the Skunk Works in Palmdale, California, as pictured in this undated handout photo provided by Lockheed Martin. Lockheed Martin Corp said October 15, 2014, that it had made a technological breakthrough in developing a power source based on nuclear fusion, and the first reactors, small enough to fit on the back of a truck, could be ready for use in a decade. McGuire, who heads the project, said he and a small team had been working on fusion energy at Lockheed's secretive Skunk Works for about four years, but were now going public to find potential partners in industry and government for their work. (Photo by Reuters/Lockheed Martin)

Arizona Cardinals cheerleader Claire Thorton, center, smiles as Air Force Capt. Eric Straub proposes to her during the first half of an NFL football game against the Washington Redskins, Sunday, October 12, 2014, in Glendale, Ariz. Thorton accepted the proposal. (Photo by Rick Scuteri/AP Photo)

Chinese commuters crowd onto a subway car on the metro during rush hour on October 16, 2014 in Beijing, China. (Photo by Kevin Frayer/Getty Images)

A ploughman demonstrates with a cultivator or “Scuffle” (R) drawn by a 1917 Fowler AA7 Steam Plough engine on day one of the 2014 “British National Ploughing Championships” on October 11, 2014 in Basingstoke, England. Over 200 ploughmen and women from across the country compete over two days in a range of classes on the 200 acre site in Hampshire. Classes range from conventional, reversible and horse-drawn ploughs, as well as classes for vintage tractors, ploughs and horticultural machinery, including steam engine ploughs. The art of ploughing helps to promote the improvement of soil structure by helping drainage and the preservation of the land for future generations of farmers. (Photo by Dan Kitwood/Getty Images)

Models prepare backstage ahead of the DRESSCAMP show as part of Mercedes Benz Fashion Week TOKYO 2015 S/S at Shibuya Hikarie on October 13, 2014 in Tokyo, Japan. (Photo by Lisa Maree Williams/Getty Images)

Demonstrator protesting the shooting death of Michael Brown and 18-year-old Vonderrit Myers Jr. kneel as they face police officers in riot gear in St. Louis, Missouri on October 12, 2014. Thousands of people took to the streets of the midwestern US city of St Louis on October 12 to protest police tactics in the wake of the racially charged shooting of an unarmed black teenager. (Photo by Joshua Lott/AFP Photo)

A protester sits front of barriers against police officers at a main street in Mong Kok district in Hong Kong Friday, October 17, 2014. Riot police cleared an offshoot Hong Kong pro-democracy protest zone in a dawn raid on Friday, taking down barricades, tents and canopies that have blocked key streets for more than two weeks, but leaving the city's main thoroughfare still in the hands of the activists. (Photo by Vincent Yu/AP Photo)

Super heated giant ash cloud spew from the crater of Mount Sinabung volcano threatening villages during an eruption on October 17, 2014 as seen from Simpang Empat district on Sumatra island. In February, Sinabung's eruption killed about 17 people and forced more than 33,000 others to flee their homes. (Photo by Sutanta Aditya/AFP Photo)

Police officers gather near a pro-democracy protest in the Central district of Hong Kong on October 13, 2014. Hong Kong has been plunged into the worst political crisis since its 1997 handover as pro-democracy activists take over the streets following China's refusal to grant citizens full universal suffrage. (Photo by Alex Ogle/AFP Photo)

An Indian woman show her hand decorated with henna design ahead of Diwali, the Festival of Lights, in Callcutta India, October 17, 2014. During Diwali, the entire house is cleaned and new clothes are purchased for the whole family. This is followed by lighting oil lamps around the house and setting off firecrackers. (Photo by Piyal Adhikary/EPA)

Women with their hands decorated with henna paste pose for pictures as they pray during the Hindu festival of Karva Chauth in the western Indian city of Ahmedabad October 11, 2014. Married Hindu women observe a one-day fast and offer prayers for the well-being of their husbands during the festival. The fast begins before sunrise and ends after they worship the moon in the evening. (Photo by Amit Dave/Reuters)

Rioben Vivero does a backflip on his skimboard at the shoreline of the coastal town of Tanauan, Leyte province, central Philippines on Sunday, October 12, 2014. Skimboarding is gaining popularity in this coastal town that was badly hit by Typhoon Haiyan last year. (Photo by Aaron Favila/AP Photo)

Models display a creation by Kwankao during Elle Fashion Week Autumn/Winter 2014, at Central World in Bangkok, Thailand, on October 12, 2014. (Photo by Borja Sanchez-Trillo/Getty Images)

General views as Serpentine Galleries marks the beginning of Frieze week by unveiling a specially commissioned fountain made from garden hoses by artist Bertrand Lavier at the Serpentine Sackler Gallery from 13 October 2014 through till 4 October 2015 at The Serpentine Sackler Gallery on October 13, 2014 in London, England. (Photo by Tristan Fewings/Getty Images for Serpentine Galleries)

Models walk the runway at the Ece Gozen show during Mercedes Benz Fashion Week Istanbul SS15 at Antrepo 3 on October 13, 2014 in Istanbul, Turkey. (Photo by Andreas Rentz/Getty Images for IMG)