SEOUL, Nov 4 (Reuters) - South Korea's military said it scrambled fighter jets after detecting about 180 North Korean military flights north of the two countries' border over four hours on Friday.South Korea scrambled 80 aircraft, including, F-35A stealth fighters, in response.About 240 aircraft participating in the Vigilant Storm exercises with the United States continued the drills, the military said.A flight of 10 North Korean warplanes made similar manoeuvres last month, prompting South Korea to scramble jets.The manoeuvres came after North Korea fired more than 80 rounds of artillery into the sea overnight, and the launch of multiple missiles into the sea on Thursday, including a possible failed intercontinental ballistic missile (ICBM)."