American and Iranian forces traded deadlier blows Sunday, and the US confirmed its 17th military death in the escalating confrontation. The latest fatality occurred Saturday in northern Iraq during an attempt to safely detonate unexploded ordnance from an Iranian attack drone, US Central Command said, the day after a missile strike in Jordan killed two US soldiers and left a third missing. And the last vestiges of the broadly outlined deal aimed at ending the conflict appeared to be collapsing, the New York Times reports. The State Department is warning Americans abroad of the risk of sudden escalation.