Canada's Liberal Party leader Michael Ignatieff, a candidate for prime minister, greets supporters at a campaign kickoff rally in Ottawa on March 26. Geoff Robins/AFP/Getty Images hide caption

Gretchen Parlato's new album is The Lost and Found. David Bartolomi/Courtesy of the artist hide caption

Women chant slogans and wave the Egyptian flag during a rally March 11 to support national unity of Muslims and Christians in Cairo's Tahrir Square, the focal point of the uprising that ousted Hosni Mubarak. Maya Alleruzzo/AP hide caption

Charles Lotter is an operator of Tower Bridge in London and can work all night if a bridge lift is required. Sleep experts say that even people who routinely work night shifts will experience times when they get sleepy in the middle of the night. Peter Macdiarmid/Getty Images hide caption

Earlier this year, Sen. Bob Corker (R-TN) helped introduce the bipartisan CAP Act, which would aim to cut federal spending by $7.6 trillion over 10 years. Mark Humphrey/AP hide caption

Greg Mortenson, the author of Three Cups of Tea and Stone Into Schools, poses with Nowseri schoolchildren in Azad Kashmir, Pakistan. Central Asia Institute hide caption

The Deepwater Horizon oil rig burns in the Gulf of Mexico, April 21, 2010. Investigations before and after the disaster found the agency responsible for overseeing the industry quite friendly with those it regulated. Gerald Herbert/AP hide caption