An escalating series of clashes in the South China Sea between the Philippines and China could draw the U.S., which has a mutual defense treaty with the Philippines, into the conflict. A 60 Minutes crew got a close look at the tense situation when traveling on a Philippine Coast Guard ship that was rammed by the Chinese Coast Guard... After the Chinese Coast Guard ship — 269 feet long and nearly twice the size of the Cape Engaño — pulled away, the Filipino crew found a three-and-a-half foot hole in the hull.... The ship Vega and her team was on...