North Korea failed to meet its weekend deadline to shut down its Yongbyon nuclear reactor, although South Korea officials say activities detected near the reactor may indicate Pyongyong intends to close down Yongbyon (AP). U.S. officials said they will give Pyongyang a few more days to meet its end of a tentative denuclearization deal, signed two months ago by Six-Party Talk members. That agreement set an April 14 deadline for North Korea to shut down the main reactor at its facility at Yongbyon. At stake are millions of dollars in energy and humanitarian aid, not to mention progress toward denuclearization and renewed inspections. A dispute over $25 million in frozen North Korean funds in a Macao bank imperils the deal.