Police fire tear gas from an armored personnel carrier on Aug. 18 in Ferguson, Mo. The U.S. Senate is holding a hearing on the use of military-grade equipment by local police departments.
Smoke rises from the Beiji oil refinery during clashes between the Islamic State and Iraqi government forces in Beiji, northern Iraq, on July 30. The militants tried to take the refinery this summer, but government forces have held on.
People stand with signs on Capitol Hill as Senate and House Democrats called for an amendment to the Constitution aimed at curbing special interests' financial clout in elections.
J. Scott Applewhite/AP