The United States flew some of its most advanced warplanes in bombing drills with ally South Korea on Thursday, a clear warning after North Korea launched a midrange ballistic missile designed to carry nuclear bombs over Japan this week, South Korea’s military said. North Korea hates such displays of U.S. military might at close range and will likely respond with fury.

Two U.S. B-1B supersonic bombers and four F-35 stealth fighter jets joined four South Korean F-15 fighters in live-fire exercises at a military field in eastern South Korea that simulated precision strikes against the North’s “core facilities,” an official from Seoul’s Defense Ministry said. The B-1Bs were flown in from Andersen Air Force Base in Guam while the F-35s came from a U.S. base in Iwakuni, Japan, the official said. He didn’t want to be named, citing office rules.