President Obama meets with President Vladimir Putin of Russia during June's G8 Summit in Northern Ireland. Can you tell they're not best buds? | (REUTERS/Kevin Lamarque)

Protesters carry an injured boy away from tear gas fired by riot police during clashes near Tahrir Square in Cairo on January 24. | (REUTERS/Mohamed Abd El Ghany)

Paris Saint-Germain's David Beckham breaks down in tears as he leaves the pitch (and his professional soccer-playing career) on May 18. | (REUTERS/Gonzalo Fuentes)

Ronnie Chambers, Jr. looks at his mother Tahitah Myles (obscured) as she collapses during the funeral for his father Ronnie Chambers, 33, a victim of gun violence in Chicago on February 4. | (REUTERS/John Gress)

The coffin of Venezuela's late President Hugo Chavez, who died of cancer, is driven through the streets of Caracas on March 6. | (REUTERS/Jorge Dan Lopez)

Britain's Prince William and his wife Catherine, Duchess of Cambridge, appear with their baby son George outside the Lindo Wing of St Mary's Hospital in London on July 23. | (REUTERS/Cathal McNaughton)

Sen. Marco Rubio stops for a sip of water during his Republican response to President Obama's State of the Union address on February 12. | (AP Photo)

A nun gasps as white smoke billows from the chimney on the Sistine Chapel, indicating a new pope has been elected, on March 13. Argentine Cardinal Jorge Bergoglio, who chose the name Pope Francis, is the 266th pontiff of the Roman Catholic Church. | (AP Photo/Emilio Morenatti, File)

An emergency responder and volunteer Carlos Arredondo (in cowboy hat), push Jeff Bauman away from the site of an explosion at the Boston Marathon on April 15. | (AP Photo/Charles Krupa, File)

Edie Windsor, plaintiff in the case against the Defense of Marriage Act, celebrates outside the Supreme Court after arguments in Washington, D.C., on March 27. | (REUTERS/Joshua Roberts)

Danielle Stephan holds her boyfriend Thomas Layton as they pause between salvaging through the remains of a family member's home one day after a tornado devastated Moore, Okla., on May 21. | (REUTERS/Adrees Latif)

Rescuers lift a Bangladeshi woman out of the rubble at the site of a building that collapsed in Savar, Bangladesh, on April 25. | (AP Photo/Kevin Frayer, File)