U.S. considers possible retaliation scenarios from Iran The U.S. and Iran are threatening new attacks against each other following the U.S. airstrike that killed Iran's top general Qassem Soleimani. Iran's government announced it would no longer abide by key terms of the 2015 nuclear agreement. CBS News senior investigative correspondent Catherine Herridge and CBS News national security reporter Olivia Gazis joined CBSN to discuss what prompted the strike and what's could happen next.