Secretary of State Antony Blinken is in no rush to blame Iran for a rocket attack on a military base in northern Iraq that left one civilian contractor dead and several others injured, including a U.S. service member.

After years of former President Donald Trump threatening Tehran with U.S. military force after its attacks in Iraq and other aggressive actions in the region, the Biden administration is vowing to try diplomacy first. But it also has yet to remove a single Trump-era sanction on Iran as it searches for a way to alter the Islamic republic’s behavior.