A retired U.S. Air Force major general has been missing for two weeks, after vanishing late last month in New Mexico, authorities said.William "Neil" McCasland, 68, was last seen at his home in Albuquerque on the morning of Feb. 27, according to the Bernalillo County Sheriff's Office, which is leading an investigation into his disappearance. Because of McCasland's background, the sheriff said multiple agencies are assisting with the probe, including federal agents with the FBI Albuquerque Field Office. "Our priority is finding Mr. McCasland safely," said Bernalillo County Sheriff John Allen in a statement. "Our investigators and search teams are working continuously, and we're coordinating closely with our local, state, and federal partners."The sheriff's office has issued a silver alert for McCasland. Under New Mexico law, the notifications are used to locate missing people aged 50 or older, "with a clear indication of irreversible deterioration of intellectual faculties," according to the office.…