The White House said it had postponed the decision for as long as it could because of the risk of civilian harm from such unexploded ordnance. US law prohibits the transfer of cluster munitions with bomblet failure rates higher than 1% - meaning more than 1% of the bomblets in the weapon do not explode - but President Biden is able to bypass this rule. More than 120 countries have committed to the Convention on Cluster Munitions, agreeing not to use, produce, transfer or store such devices