BOULDER, Colo. (AP) — The U.S. Postal Service and a rural Colorado man argued in court Wednesday over where on postal property people can legally carry guns.A three-judge panel of the 10th U.S. Circuit Court of Appeals heard arguments in the case involving Tab Bonidy, a licensed gun owner who, along with the National Association for Gun Rights, sued the Postal Service in 2010 over its ban on guns in post offices.Bonidy said the post office in Avon, a small town near Colorado's Vail and Beaver Creek ski resorts, violated his Second Amendment rights by refusing to let him carry his concealed handgun into the building when he picks up his mail.