The destroyer Fitzgerald had a "safe and professional interaction" with an Iranian helicopter while operating in international waters, the official said.
The Pentagon has acknowledged that an Iranian ballistic missile hit Al Udeid Air Base in June during an Iranian attack after Trump downplayed the assault.
Opinion: The appropriate medal for troops who participated in the strikes on Iranian nuclear sites is not the one a Texas congressman recently proposed.
President Trump ordered U.S. forces to strike three key Iranian nuclear sites in June, a decision the Israeli leader says warrants a Nobel Peace Prize.
Opinion: Analysts will need more intelligence from more sources to make a confident judgment about the effects on Fordo and Iran’s broader nuclear efforts.
By Joshua Rovner, American University, The Conversation