By Soo-hyang Choi and Josh Smith SEOUL (Reuters) – South Korea said it scrambled warplanes in response to 180 North Korean military flights near the countries’ shared border on Friday, and Pyongyang again demanded that the United States and South Korea halt “provocative” air exercises. The North Korean manoeuvres follow the firing of more than 80 rounds of artillery overnight and the launch of multiple missiles into the sea on Thursday, including a possible failed intercontinental ballistic missile (ICBM). North Korean aircraft were detected in multiple areas north of the “tactical action line…