The U.S. and South Korean militaries began a massive joint drill on Monday that'll run for five days and feature hundreds of warplanes taking part in attack preparation scenarios 24 hours a day, per Reuters.
The big picture: Operation Vigilant Storm builds on the countries' largest joint military exercises since 2017 in August, launched in the face of threats from North Korea's military. The air forces will this week conduct about 1,600 sorties — "the largest number ever for this annual event," according to a U.S. Air Force statement.
