North Korea shut down another hotline with its southern neighbor Wednesday, adding to a long series of provocations and threats toward South Korea and the West. The move was in response to increased sanctions on the already isolated country. As each Korea appears head strong to march toward war, the U.S. has continued agreements with South Korea that tie our fortunes in this conflict. America would be obligated, under this agreement, to assist in the defense of South Korea should the North attack. Fear regarding the escalating conflict is not something just theoretical, in 2010 North Korea sunk a South Korea ship and 46 sailors were killed. Observers are saying that there isn’t a lot more sabre rattling North Korea can do before Kim Jong Un has to actually do something to back it up. Gordon Chang is an expert on the region and joined 'Real News' to discuss the dangers in play and what the U.S. has exposed itself to.