According to a number of experts, tensions between North and South Korea are at one of the highest levels since the Korean War since North Korea allegedly torpedoed a South Korean vessel and killed 46 sailors. Why did North Korea do this? What should be the response from South Korea and the U.S.? How much military support could the U.S. provide South Korea in the event of a conflict? And what is the real role of China in all of this? We ask retired U.S. Army Major General Paul Vallely.
