The field of horses charges down the stretch in the seventh race at Churchill Downs in Louisville, Ky., on June 19, 2009. The day marked the first night racing at the storied track in its 135-year history. Track superintendent Butch Lehr is retiring after Saturday's race. He's been maintaining the track since 1982.
The surface on which Kentucky Derby horses will race Saturday is a special piece of real estate, built for high performance and safety. The track is generically described as dirt, but is actually a careful mixture of river sand, silt and clay.
In this photograph of a courtroom sketch, Khalid Sheikh Mohammed, charged with orchestrating the Sept. 11 attacks, attends a court hearing at Guantanamo in 2008. He's expected to appear in a military court Saturday.
Khalid Sheikh Mohammed and four other men charged in the Sept. 11 attacks were supposed to be tried six years ago in a military tribunal created by the Bush administration.
But that system — which allowed hearsay evidence, among other things — faced questions about its fundamental fairness. When President Obama came into office, he put all the proceedings at Guantanamo on hold and asked that the commission system be revamped.
Since then, there has been an effort to make sure the trials at Guantanamo are credible, with both Congress and the Supreme Court weighing in.
Invisible Children's "Kony 2012" video about Central African warlord Joseph Kony went viral earlier this year but is seen as a cautionary tale by some social media experts. Here, the group's co-founders, Jason Russell, Bobby Bailey and Laren Poole, record footage in Africa in 2007.
Hours after Facebook put out a call Tuesday for its users to register as organ donors, 6,000 people had already signed up. That's more than 15 times the number of people who normally register each day, according to Donate Life America, which is collaborating with Facebook.
Dominique Strauss-Kahn, the former chief at the International Monetary Fund, is facing more allegations of sexual misconduct.
Strauss-Kahn was considered a top contender for the French presidency until he was accused of rape by a New York City hotel maid. That case against him was dropped, but it cost him his IMF job and then French investigators implicated Strauss-Kahn in a prostitution probe.
The husband-and-wife duo The Mastersons have an impressive new release out called "Birds Fly South", and an impressive tour opening for AND playing with Steve Earle and the Dukes this Spring. Tune in for a live session with them and Roland Dierauf.