April 5, 2016 7:00 pm High Security for Nuclear Security Summit in Washington Security was tight for the Nuclear Security Summit in Washington, D.C. on March 30 through April 1. News 4’s Megan McGrath reports. Local 3:36 DC officer shot near police station in Northwest, rushes inside for help 2:38 Cargo ship that destroyed Key Bridge pulled back to Port of Baltimore 1:07 Cargo ship that crashed into Baltimore bridge moving back to port 0:43 See It: Cargo ship that brought down Key Bridge towed back to port 3:21 Crews working to refloat Dali cargo ship