Where has national security come since 9/11?
Clip: Season 1 | 7m 48s
On the 10-year anniversary of September 11, 2001, Need to Know host Alison Stewart talks with the Chair of the 9/11 Commission, Tom Kean, about where our country has come since 9/11 in terms of security and what remains to be done.
Aired: 09/08/11
