A US Navy ship fired warning shots at an Iranian patrol boat that came within 150 yards of it in the Persian Gulf. The Iranian boat is believed to have been operated by the Iranian Revolutionary Guard Corps, according to a defense official familiar with details of the incident. The officials said the Iranian boat approached and came within 150 yards of the USS Thunderbolt, a US Navy patrol ship. The USS Thunderbolt was accompanied by the USS Vella Gulf, which is a Ticonderoga-class guided missile cruiser, and two other US Coast guard vessels at the time. The Iranians did...