Biden worried about another terrorist attack

Washington: Vice President Joe Biden says he's less worried about another Sept. 11-style attack than a strike by a lone bomber like the man who tried to blow up a Northwest Airlines plane last Christmas.
Discussing US vulnerability in an interview on CBS's "The Early Show," Biden said, "Am I less worried about a catastrophic event? Yes."
Biden said he's more concerned about an attack "along the lines of the Christmas Day bomber." He said he considers that a greater threat than terrorism which requires "the kind of planning that's needed to pull off a very complicated 9-11."