New Jersey Rep. Tom Kean returns to Congress after mysterious absence

The mystery behind a New Jersey congressman's months-long absence is solved.

GOP Rep.

Tom Kean spoke on the floor, saying he owed his constituents, colleagues and the American people an explanation.

But he did not answer questions from the press, and it's unclear why he chose to keep constituents in the dark.

Lisa Desjardins reports on Kean and the other big questions looming over Capitol Hill. ...