Wheeled out on a stretcher.  Remember, he was diagnosed with a malignant brain tumor in May.

Senator Byrd (D-W.Va) collapsed as well, although it doesn't sound as serious.  I'm not a big fan of Byrd, being a former Klansman and all.

(Photo from earlier in today's inaugural luncheon)

UPDATE:  Senator Claire McCaskill (D-Mo), who has been twittering all day, notes Kennedy's collapse.