Congressional staff members gather at the Capitol to raise awareness of the recent killings of black men by police officers, both of which did not result in grand jury indictments, in Washington, Thursday, Dec. 11, 2014. They are joined by Rep. Elijah Cummings, D-Md., second from left, and Senate Chaplain Barry Black, far right. The walkout came as both houses of Congress attempt to pass a spending measure and avert government shutdown.
J. Applewhite Associated Press