Two U.S. Air Force B-1B Lancer bombers flew over the Korean peninsula in a show of force on Tuesday night, South Korea’s Joint Chiefs of Staff (JCS) said on Wednesday.

The JCS said two F-15K fighter jets of the Republic of Korea Air Force (ROKAF) and two U.S. B-1B strategic bombers took off from Andersen Air Force Base in Guam and staged a joint training exercise.

“The formation of the U.S. B-1B [Lancer bombers] conducted simulated air-to-surface missile-firing drill over the East Seas after entering the KADIZ (Korea Air Defense Identification Zone),” the JCS said in a written statement.

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