James Joyner | Tuesday, June 23, 2009

Investigators and officials continue to work at the scene of a rush-hour collision between two Metro transit trains in northeast Washington, D.C., Tuesday morning, June 23, 2009. (AP Photo/Charles Dharapak)

Investigators and officials continue to work at the scene of a rush-hour collision between two Metro transit trains in northeast Washington, D.C., Tuesday morning, June 23, 2009. (AP Photo/Charles Dharapak)