Air Force One is the official air traffic control call sign for any United States Air Force aircraft carrying the President of the United States. The most recognized version is a modified Boeing 747-200B, designed to provide secure and comfortable travel for the President and their staff. It features advanced communication systems, allowing the President to conduct business while in the air. The aircraft is equipped with defensive measures and can withstand various threats, ensuring the safety of its passengers. Air Force One also includes a medical suite, a conference room, and accommodations for the President's staff, making it a flying command center.