NEW : Next terror attack on U.S. likely to originate in Pakistan tribal areas , report says . Comment: Biological attack more likely than nuclear attack , report says . It wo n't be accomplished without putting this issue ahead of some other competing national and international goals . Number of nations with nuclear weapons also growing , panel says .
NEW : Next terror attack on U.S. likely to originate in Pakistan tribal areas , report says . Comment: Biological attack more likely than nuclear attack , report says . Number of nations with nuclear weapons also growing , panel says .