How provocative has the United States been to North Korea?

For almost two months, the U.S. and South Korea have had more than 200,000 ground troops, tanks, helicopters, fighter bombers, strategic bombers, submarines and destroyers exercising close to the demilitarized zone (DMZ) and a disputed sector of the Yellow Sea on the border between the two Koreas.

When a U.S. Marine Corps CH-53E Super Stallion helicopter made a hard landing Tuesday, injuring six crew members, it was noted in passing that the accident occurred at the Jipo-ri Range — about 20 km from the DMZ.