The United States flew a B-1B supersonic bomber over South Korea on Wednesday in part of a massive combined aerial exercise involving hundreds of warplanes, a clear warning after North Korea last week tested its biggest and most powerful missile yet.

South Korea’s Joint Chiefs of Staff said the Guam-based bomber simulated land strikes at a military field near South Korea’s eastern coast during a drill with US and South Korean fighter jets.

“Through the drill, the South Korean and US air forces displayed the allies’ strong intent and ability to punish North Korea when threatened by nuclear weapons and missiles,” the JCS said in a statement.

Flyovers of B-1Bs have become an increasingly familiar show of force to North Korea, which after three ICBM tests has clearly moved closer toward building a nuclear arsenal that could viably target the U.S. mainland.

The five-day drills that began Monday involve more than 200 aircraft, including six US F-22 and 18 F-35 stealth fighters.

North Korea hates such displays of American military might at close range and claimed through its state media on Tuesday that the “US imperialist war mongers’ extremely reckless war hysteria” has put the region at risk of a nuclear war.

The North continued to describe the B-1B a “nuclear strategic bomber” although the plane was switched to conventional weaponry in the mid-1990s.

North Korea announces intercontinental missile launch Show all 13 1 /13 North Korea announces intercontinental missile launch North Korea announces intercontinental missile launch Pyongyang residents react after the news of the successful launch of the new intercontinental ballistic missile AFP/Getty Images North Korea announces intercontinental missile launch North Korea's leader Kim Jong Un signing an order to test-fire the newly developed inter-continental ballistic missile KRT via AP Video North Korea announces intercontinental missile launch A news broadcast displays Kim Jong Un's signed document AP North Korea announces intercontinental missile launch People cheer as they watch the news broadcast announcing Kim Jong Un's order to test-fire the new inter-continental ballistic missile AFP/Getty Images North Korea announces intercontinental missile launch Residents react after the document signing AP North Korea announces intercontinental missile launch Pyongyang residents celebrate Kim Jong Un's announcement AFP/Getty North Korea announces intercontinental missile launch Cheering Pyongyang residents react AP North Korea announces intercontinental missile launch To counter North Korea's missile test, South Korea fired missiles into the East Sea The Defence Ministry/Yonhap via REUTERS North Korea announces intercontinental missile launch The Hyunmu-2 missiles firing during the drill South Korean Defense Ministry vi North Korea announces intercontinental missile launch The exercise was carried out in an attempt to counter Kim Jong Un's order South Korea Defense Ministry via AP North Korea announces intercontinental missile launch The South Korean army continue to carry out military exercises AP North Korea announces intercontinental missile launch Where K-9 self-propelled howitzers were taking part in a drill Rex Features North Korea announces intercontinental missile launch US soldiers are also present in the border city of Paju AFP/Getty Images

North Korea typically uses strong language when commenting on U.S.-South Korean war games, which it claims are invasion rehearsals. Still, perennially bad tensions are at a particularly dangerous point with North Korea rapidly advancing its nuclear weapons program.

South Korea’s military says the Hwasong-15 the North tested last week has the potential to strike targets as far away as 13,000 kilometres (8,100 miles), which would put Washington within reach. The test flight used an arched trajectory and the missile flew 950 kilometers (600 miles) before splashing down near Japan.

The North also tested a different intercontinental ballistic missile twice in July and conducted its most powerful nuclear test in September which it described as a detonation of a thermonuclear weapon designed for ICBMs.