Why did North Korea launch a missile days before US-South Korea drills?

Why did North Korea launch a missile days before US-South Korea drills? Why did North Korea launch a missile days before US-South Korea drills? Pyongyang has repeatedly condemned US-South Korea military exercises, describing them as rehearsals for an invasion. “North Korea has never simply let” a US-South Korea military exercise pass without responding, Lim Eul-chul, a North Korea expert at Kyungnam University, told AFP. South Korea says Wednesday’s launch was North Korea’s 11th suspected ballistic missile test of the year.