By COREY DICKSTEIN | STARS AND STRIPES Published: March 11, 2021 WASHINGTON — A civilian who entered Joint Base Andrews, the home of Air Force One, and accessed a military aircraft last month was improperly allowed onto the Maryland installation by a “distracted and complacent” airman guarding a gate, an Air Force Inspector General investigation concluded. A Security Forces airman on Feb. 4 failed to ensure the civilian had proper credentials to enter Joint Base Andrews before granting him access to the installation, where hours later he accessed the flight line and boarded a C-40 transport aircraft, an IG report released Thursday determined. The airman’s mistake at Andrews’ southern Virginia Gate was the first in a series of critical security failures on post that ultimately resulted in the arrest of the man, who the Air Force has declined to name publicly.