By Brittney Melton Good morning. You're reading the Up First newsletter. Subscribe here to get it delivered to your inbox, and listen to the Up First podcast for all the news you need to start your day. The U.S. has evacuated diplomats across the Middle East and shut down some embassies today as the war with Iran enters its fourth day. The U.S. is telling citizens to evacuate more than a dozen countries. Limited flights out of the Middle East resumed yesterday, but hundreds of thousands of travelers remain stranded at aviation hubs in the region. Israeli warplanes are striking Tehran in Iran and Beirut in Lebanon. Meanwhile, Iranian drones hit the U.S. Embassy in Saudi Arabia. At least six U.S. service members have died in action.…