A State Department spokesman said American policy on the use of cluster bombs will not change, adding that such weapons "are absolutely critical and essential."

Cluster bombs often leave behind smaller munitions, called "bomblets," which can go off many years after the initial bomb is dropped, injuring civilians.

1. "...a new international standard that will enhance the protection of civilians, strengthen human rights and improve prospects for development." —Ban Ki-moon, UN Secretary-General
2. "We are very strongly committed to work to address this problem, but we may have some disagreements about the right venue and the right tactics to follow."—Scott Stanzel, White House spokesman
3. "This is a treaty drafted largely by countries which do not fight wars. Treaties like this make me want to barf. It's so irrelevant. Completely feel-good..." —John Pike, defense analyst