UNITED NATIONS (AP) — The head of the U.N. committee monitoring sanctions against North Korea on Wednesday proposed granting an exemption for a senior official from Pyongyang to attend the Winter Olympics in South Korea with his country's high-level delegation though he is subject to a travel ban and asset freeze. Ambassador Karel Van Oosterom of the Netherlands, who chairs the Security Council committee, sent a proposed letter of approval to Security Council members with a deadline of 3 p.m.