Crazed gunman holed up at NASA Johnson Space Center

Link, no known casualties, but gunshots heard at Johnson Space Center building 44. What a dark week in America.

Update: a local news station reports that both the white male gunman and a second male, a hostage, are dead. A third person, a female hostage, was "duct taped but uninjured."

Reader comment: Michael Calanan says,

The video embedded on this site appears to be raw video (no sound) right from the chopper cam. The page also links to streaming video of the local ABS news station's broadcast at: Link.

Toadstar says,

Here is one of the local Houston TV channels that is covering the event live.