Members of the U.S. Secret Service's Counter Assault Team, known in the agency as CAT, are seen before boarding helicopters at a landing zone in Rijksmuseum in Amsterdam, Netherlands, on Monday. Pablo Martinez Monsivais/AP hide caption
Secret Service scandal
Secret Service agents stood watch earlier this month as President Obama arrived at Dallas Love Field airport. Brendan Smialowski /AFP/Getty Images hide caption
Mark Sullivan, Director of the United States Secret Service, at a hearing of the Senate Homeland Security and Government Affairs Committee in May of 2012. Brendan Smialowski /AFP/Getty Images hide caption
In Cartagena, a prostitute stands on a corner in the historical district. Manuel Pedraza /AFP/Getty Images hide caption
Homeland Security Secretary Janet Napolitano as she testified this morning before the Senate Judiciary Committee. Mark Wilson/Getty Images hide caption