Sudan must allow a team of U.N. personnel into Darfur and formally accept an international force for the area by the end of the year or face unspecified U.S. steps next year, a U.S. special envoy said on Wednesday. Andrew Natsios, U.S. President George W. Bush’s special envoy for Sudan, told reporters he delivered the message to Sudanese President Lt. Gen. Omar Hassan al-Bashir during a visit to Khartoum this month. Full Story