The U.S. Department of Homeland Security warned Americans of a "heightened threat environment" on June 22 that could include attacks on U.S. soil. That fear appeared to dissipate when Iran attacked a United States military base in Qatar June 23, injuring no one.

The whipsaw chain of events involving Iran, Israel and the United States that culminated in a surprise ceasefire has raised many questions about how the

The Iranian military announced the strike against Al Udeid Air Base. Qatar confirmed the attack and said there were no casualties.