Airports have been packed with thousands of stranded travelers following airspace closures and widespread flight cancellations and delays. Here's what to know.

Some U.S. and other international airlines are keeping a halt on flights to major Middle Eastern airports as global carriers scramble to figure out whether to continue flying to the region amid intensifying conflict between Israel and Iran and military intervention by the U.

The Iranian strike, which U.S. President Donald Trump later described as "weak" and which the White House says was telegraphed before it was carried out in order to minimize casualties, came in response to unprecedented U.S. strikes on Iran's nuclear facilities last week, which were carried out with the largest non-nuclear bombs on earth.