The US Air Force checked the security of the entire world base after the Andrews, where Air Force One was located, was hacked.

The US Air Force said on February 5 that its inspector general is directing an investigation into the case of a strange man breaking into Andrews Union Base, where the President's Air Force One is located.

"Security of our base is of paramount importance. This is a serious security breach," said Col Roy Oberhaus, commandant at Andrews Base.

The announcement comes after an unidentified man, unarmed, "illegally intruded" Andrews Union Base and boarded a C-40, military version of the Boeing 737.

Andrews Union Base Security Forces responded, detained and interrogated the intruder.

"Everyone in the Department of Defense and certainly everyone in the Air Force understand what this serious problem is," Pentagon spokesman John Kirby told reporters, adding that the Air Force had adjusted a

Andrews Common Base in Maryland, about 24 kilometers southeast of the White House in Washington, is home to aircraft for the president, vice president and cabinet leaders to travel around the country and around the world.

Report of the incident came hours before President Joe Biden was scheduled to travel from Andrews base to Delaware state.