(April 2012). A proof test is a form of stress test to demonstrate the fitness of a load-bearing structure, or rescue strop. An individual proof test may apply only to the unit tested, or to its design in general for mass-produced items. Such a structure is often subjected to loads above that expected in actual use, demonstrating safety and design margin.
The United States and North Korea do not have diplomatic relations. The Swedish Embassy in North Korea is the U.S. protecting power and provides limited consular services to U.S. citizens. The U.S. Special Representative for North Korea Policy is Ambassador Joseph Yun. The U.S. Special Envoy for North Korean Human Rights Issues is Vacant.
With the help of the Soviets the North raised and trained 120,000 troops compared to the South's 60,000 troops. This is amazing because North Korea had half the population of South Korea. How the war started is still unclear; the UN says that North Korea was the first to attack while North Korea says that South Korean troops were the first to attack. The North Korea quickly took over most of South Korea until the UN involved itself and took back South Korea. At this time South Korea was essentially a commonwealth of the US. When the US saw North Korea attack the South they saw a attempt by the Soviets to attack the US. No peace treaty was ever signed after the Korean War so we are still at war with North Korea. Hope this helps.