D.C. snowpocalypse has closed government buildings for a second day — for those not subject to this winter siege, we’re told to expect another 10 to 20 inches of snowfall imminently — and the closure grinds policymaking to a halt. The Senate Armed Services Committee just canceled a closed-door briefing it was going to get this afternoon from the Obama administration about the plan to shut down the detention facility at Guantanamo. The now-indefinitely-postponed witness list:

Honorable William J. Lynn
Deputy Secretary of Defense

General James E. Cartwright, USMC
Vice Chairman of the Joint Chiefs of Staff

Ambassador Daniel Fried
Special Envoy for Guantanamo
Office of the Secretary of State

Mr. Matthew G. Olsen
Executive Director
Guantanamo Detainee Review Task Force
Office of the Attorney General, Department of Justice

Mr. Charles W. Alsup
Assistant Deputy Director of National Intelligence for Customer Requirements