UNITED NATIONS, March 15 (Reuters) - China blocked the United States on Wednesday from broadcasting on the internet an informal United Nations Security Council meeting on human rights abuses in North Korea, diplomats said. The aim of the informal council discussion is to spotlight rights abuses in North Korea and "identify opportunities for the international community to promote accountability," according to a note to council members last week from the United States and elected council member Albania, which is co-hosting the meeting. See here for a complete list of exchanges and delays