Name: Biden: Americans must ‘be vigilant’
Uploaded: Fri Sep 09 2011 00:00:00 GMT+0000 (UTC)
Duration: 2 min 41 s
Description: Vice President Joseph Biden discusses the threat of a terrorist attack on the United States on the 10-year anniversary of 9/11, and tells TODAY’s Ann Curry that the Obama administration is using every asset to help thwart further terrorism.

Sept. 9, 201102:41