It’s been exactly two weeks since retired Major General William Neal McCasland disappeared from his New Mexico home. His disappearance is gaining national attention because the Air Force base he commanded was once the headquarters for a military program that oversaw U.F.O. investigations.  Authorities believe General McCasland left his home with his wallet, his hiking boots and his gun, notably leaving his cellphone and prescription glasses behind.  Now federal officials and his wife - who addresses the alien theories - are asking for the public’s help in finding him.