By Enas Alashray, Tala Ramadan and Yomna EhabCAIRO/DUBAI, July 15 (Reuters) - The U.S. launched two waves of attacks on Iran's coastal defenses and missile sites on Wednesday after reimposing a naval blockade of its ports, while Iran struck back by targeting U.S. military sites in neighboring countries in what it called an "existential war" with America.The latest escalation comes days after a fragile truce collapsed, raising the specter of a return to full-scale war, with Iran once again threatening to shut off more regional energy exports.

US Centcom says latest salvo targeted Iran's coastal defence systems, missile and drone sites, maritime capabilities; IRGC claims air control radar of US Navy's Fifth Fleet in…

The United States launched on Tuesday a fresh wave of strikes on Iran and President Donald Trump vowed to reimpose a naval blockade, prompting Tehran to respond with attacks on…