An “Isolation box” at Paddington Station in central London on February 11, 2015, to highlight new figures that an estimated 550,000 people living with cancer in Britain are currently suffering from loneliness. The Isolation box, which allows people outside to see in but stops the person inside seeing out, aims to evoke the same feelings of loneliness and isolation many cancer patients experience after a diagnosis. (Photo by Leon Neal/AFP Photo)

A Pakistani policewoman fires a heavy machine gun during a special elite police training course at a police training centre in Nowshera, a district in the Khyber Pakhtunkhwa Province on February 11, 2015. (Photo by A. Majeed/AFP Photo)

A costumed man is pictured during a carnival parade in Mittenwald, southern Germany on Febraury 12, 2015. (Photo by Angelika Warmuth/AFP Photo)

A volunteer photographs a woman as she kisses a volunteer wearing a condom costume during marking the International Condom Day in Kiev, Ukraine, 13 February 2015. The event was organized to promote and create awareness towards “Safe s*x” and the use of condoms to control and prevent Human Immunodeficiency Virus (HIV) and other sexually transmitted diseases on the occasion of the International Condom day. (Photo by Roman Pilipey/EPA)

Tattooist Eddy Del Rio, right, applies a tattoo to Alexa Barosky at Anchor Ink Tattoo, Tuesday, February 10, 2015, in Salt Lake City. Lawmakers have decided more discussion is needed on a proposal that would place an outright ban on tattooing minors, even with parental permission. During a Tuesday afternoon hearing, a committee decided to hold on to the proposal from Rep. LaVar Christensen, a Draper Republican. (Photo by Rick Bowmer/AP Photo)

A man pushes his bicycle in a blizzard on a road near Zalaszentbalazs, 214 kms southwest of Budapest, Hungary, Sunday, February 8, 2015. Traffic on several minor roads in the western and southwestern parts of Hungary came to a halt due to the heavy snowstorms during Sunday. (Photo by Gyorgy Varga/AP Photo/MTI)

A police dog attacks a man playing the role of a criminal during a security drill in a BRT Transcarioca (Rapid Transit Bus) station in Rio de Janeiro, Brazil, Wednesday, February 11, 2015. Special operations battalion, BOPE, police officers and dog units participated in a security drill simulating a hostage situation in preparation for the Rio 2016 Olympics. (Photo by Felipe Dana/AP Photo)

A police dog attacks a man playing the role of a criminal during a security drill in a BRT Transcarioca (Rapid Transit Bus) station in Rio de Janeiro, Brazil, Wednesday, February 11, 2015. (Photo by Felipe Dana/AP Photo)

South Korean and United States marines ride on inflatable boats during a joint landing exercise to prepare for a possible North Korea's surprise attack in waters off Ganghwa Island, located inside of the civilian passage restriction line that separates the two Koreas since the Korean War, South Korea, Tuesday, February 10, 2015. North Korea test-fired five short-range missiles into the sea on Sunday in its second such weapons test this year, a South Korean defense official said, amid dimming prospects for the resumption of high-level talks between the rival countries. (Photo by AP Photo/Yonhap)

In this Saturday, January 24, 2015 photo, Rob Norris, owner of the Piano Mill in Rockland, Mass., stands beside a piano once owned by Liberace. A section of roof collapsed into the music store's showroom under the weight of snow Tuesday, February 10, 2015, after Rockland received 29 inches of new snow the previous day. Norris said it is unclear if the Liberace piano was damaged. No one was in the building at the time of the collapse, nor is anyone being allowed inside until a structural engineer assesses damage. (Photo by Michael Dwyer/AP Photo)

A man shops for gifts ahead of Valentine's Day at the Karrada neighborhood of Baghdad, Iraq, Wednesday, February 11, 2015. Despite violence and harsh circumstances, some Iraqis shop for gifts for their loved ones, marking Valentine's Day. (Photo by Khalid Mohammed/AP Photo)

An Iraqi woman walks past a shop displaying red teddy bears in preparation for Valentine's day in Baghdad's Karrada district on February 12, 2014. (Photo by Ahmad Al-Rubaye/AFP Photo)

Women dance Caporal during the carnival in La Paz, Bolivia, Saturday, February 7, 2015. The Caporal dancers accompany fellow carnival characters Chuta, Pepino and Chola who represent gaiety and never tire of dancing. (Photo by Juan Karita/AP Photo)

An Iraqi shop owner clean up a food stall near the site of a suicide bombing that targeted a street filled with hardware stores, killing over 20 people and wounding at least 45, in the Iraqi capital's southeastern neighborhood of New Baghdad, Saturday, February 7, 2015. A pair of bombings in the Iraqi capital Saturday killed more than three dozen people hours before the city's longtime curfew was set to come to an end. The other attack was in central Baghdad's popular Shorja market where police said two improvised explosive devices detonated 25 meters apart from one another. (Photo by Karim Kadim/AP Photo)

A woman stands in front of Mexican army military police in a neighborhood in the city of Chilpancingo, Mexico, Friday, February 6, 2015. Residents were blocking a road to protest the detention of two members of their community and battled with military police dressed in riot gear who tried to clear the road. At least three people were detained. (Photo by Alejandrino Gonzalez/AP Photo)

Women confront military police officers as they gather to show their support for the presence of the Community Police of the FUSDEG (United Front for the Security and Development of the State of Guerrero), during clashes in Petaquillas, on the outskirts of Chilpancingo, in the Mexican state of Guerrero February 6, 2015. Approximately 500 members of the Community Police from the FUSDEG took control of the security of Petaquillas on the night of January 30 at the request of the people tired of the actions of organized crime, local media reported. Based on the traditional indigenous justice system, the Community Police is made up of volunteers from different communities of Guerrero, and was created in response to the spate of violence in several locations in the state. The villagers demand the release of two community police officers who were arrested on the morning. (Photo by Jorge Dan Lopez/Reuters)

A crocodile is seen for sale at a food market in Bata, February 6, 2015. (Photo by Amr Abdallah Dalsh/Reuters)

Sports Illustrated swimsuit models Kelly Rohrbach, Ashley Smith (2nd R), and Hailey Clauson (R) pose together on the floor of the New York Stock Exchange, February 6, 2015. (Photo by Brendan McDermid/Reuters)

Sports Illustrated swimsuit models Kelly Rohrbach (C) and Ashley Smith (R) are given a tour of the floor of the New York Stock Exchange February 6, 2015. (Photo by Brendan McDermid/Reuters)

Trader Peter Tuchman (3rd R) poses with Sports Illustrated swimsuit models (L-R) Ashley Smith, Hannah Ferguson, Hailey Clauson, Sara Sampaio, and Kelly Rohrbach on the floor of the New York Stock Exchange February 6, 2015. (Photo by Brendan McDermid/Reuters)

Actor Chris Pratt (top R) grabs male student cast member Matthew Walker (bottom R), with fellow cast member Karl Kopczynski looking on, as Pratt is roasted and honored as Hasty Pudding Theatricals' Man of the Year at Harvard University in Cambridge, Massachusetts February 6, 2015. The skit was taken from the movie “Her”. (Photo by Brian Snyder/Reuters)

People react during a thrill ride at an amusement park in Lima's Green Coast February 6, 2015. (Photo by Enrique Castro-Mendivil/Reuters)

A boy stands at the back of a minibus used for public transportation in Port-au-Prince, Haiti February 6, 2015. (Photo by Andres Martinez Casares/Reuters)

A woman looks out of a window of a transportation truck called “Tap Tap” in Petion Vile in Port-au-Prince February 6, 2015. (Photo by Andres Martinez Casares/Reuters)

People walk near transportation pick-up trucks called “Tap Tap” at a station in Petion Vile in Port-au-Prince February 6, 2015. (Photo by Andres Martinez Casares/Reuters)

Members of the Quilt Performing Arts Company perform during a concert in celebration of the 70th anniversary of the birth of late reggae legend Bob Marley in Kingston February 6, 2015. Jamaicans celebrate Marley's 70th birthday on Friday with a jamming session at his former home and a free concert as the Caribbean island continues to wrestle over his place in its pantheon of heroes. Marley, who was born in Nine Miles, northwest Jamaica, died on May 11, 1981, in a Florida hospital from cancer age 36. (Photo by Gilbert Bellamy/Reuters)

Indian women wait in a queue to cast their votes at a polling booth in New Delhi, India, Saturday, February 7, 2015. Voters cast ballots in the Indian capital on Saturday in an election that is seen as a litmus test for the popularity of Prime Minister Narendra Modi and his Hindu nationalist party. Opinion polls ahead of the vote to choose New Delhi's 70-member assembly suggest that Modi's Bharatiya Janata Party is either locked in a close contest with the upstart Common Man's Party or will come in second. (Photo by Manish Swarup/AP Photo)

India's ruling Bharatiya Janata Party (BJP) chief ministerial candidate for Delhi Kiran Bedi (C), who cast her vote at a polling station, prepares to step down from the bonnet of the car after greeting her supporters during the state assembly election in New Delhi February 7, 2015. (Photo by Adnan Abidi/Reuters)

Voters stand with their children in a queue to cast their votes at a polling station during the state assembly election in New Delhi February 7, 2015. (Photo by Anindito Mukherjee/Reuters)

Government employees lift their colleague as they shout slogans during a protest in Srinagar February 7, 2015. Indian police detained dozens of demonstrators on Saturday during the protest demanding greater regularization of temporary jobs and a hike in salaries, protesters said. (Photo by Danish Ismail/Reuters)

A missile is fired from a naval vessel during the test-firing of a new type of anti-ship cruise missile to be equipped at Korean People's Army (KPA) naval units in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang February 7, 2015. (Photo by Reuters/KCNA)

A man works on a snow sculpture of a tank during an amateur snowman parade and contest in Moscow February 7, 2015. (Photo by Sergei Karpukhin/Reuters)

A woman looks through a snow sculpture while posing for a picture during an amateur snowman parade and contest in Moscow February 7, 2015. (Photo by Sergei Karpukhin/Reuters)

People attend an amateur snowman parade and contest in Moscow February 7, 2015. (Photo by Sergei Karpukhin/Reuters)

Chelsea manager Jose Mourinho reacts as the Aston Villa mascot extends his hand towards him before their English Premier League soccer match at Villa Park, Birmingham, February 7, 2015. (Photo by Darren Staples/Reuters)

A bus passes a surface-to-air missile mounted on top of the Hayward Gallery, at Southbank in central London, February 7, 2015. The six-tonne Bloodhound missile has been preserved, restored and now shown by British artist Richard Wentworth in the Cold War section of “History is Now”, an exhibition on Britain since the Second World War. (Photo by Toby Melville/Reuters)

Followers of the Houthi group dance the during a rally at the main stadium in Sanaa, Yemen February 7, 2015. The leader of the group that has taken over Yemen, Abdel Malik al-Houthi, said on Saturday that he is open to participation with other parties. (Photo by Khaled Abdullah/Reuters)

A man walks past a poster, commemorating Shi'ite fighters who were killed in battles with Islamic State militants, at Tahrir Square in Baghdad, Iraq February 7, 2015. Baghdad residents commended a decision by Iraq's Prime Minister Haider al-Abadi to end their city's nightime curfew on Saturday. Some form of curfew has been in place since the U.S.-led invasion to topple Saddam Hussein in 2003, hindering commercial and civilian movement. The midnight (21:00 GMT) to 5 a.m. curfew has been in place for more than seven years. (Photo by Ahmed Saad/Reuters)

Spanish actress Megan Montaner poses on the red carpet before the Spanish Film Academy's Goya Awards ceremony in Madrid, February 7, 2015. (Photo by Javier Barbancho/Reuters)

Spanish actress Ursula Corbero poses on the red carpet before the Spanish Film Academy's Goya Awards ceremony in Madrid, February 7, 2015. (Photo by Javier Barbancho/Reuters)

Spanish actress Penelope Cruz poses on the red carpet before the Spanish Film Academy's Goya Awards ceremony in Madrid, February 7, 2015. (Photo by Javier Barbancho/Reuters)

Sahrawi actress Mariam Bachir poses on the red carpet before the Spanish Film Academy's Goya Awards ceremony in Madrid, February 7, 2015. (Photo by Javier Barbancho/Reuters)

Barbara Lennie of Spain kisses her Goya for Best Leading Actress during the Spanish Film Academy's Goya Awards ceremony in Madrid February 8, 2015. (Photo by Javier Barbancho/Reuters)

Actress Olivia Grant arrives at the British Academy of Film and Arts (BAFTA) awards ceremony at the Royal Opera House in London February 8, 2015. (Photo by Toby Melville/Reuters)