Viewpoint: What is driving North Korea's threats?

More than 40,000 US and South Korean troops are currently conducting military manoeuvres on the Korean Peninsula, as part of the annual Foal Eagle exercise. US bombers, fighter aircraft and submarines have made their way to the region in an effort to "enhance the security and readiness" of South Korea. Those exercises are seen as a visible way for Washington to reassure Seoul of the reliability of its alliance and extended deterrence commitment.

See the full article at BBC News