HOW THE US TRANSPORT THE WORLD MOST SECURED PRESIDENTS CONVOY.....

The United States government maintains a variety of vehicles for the president. Because of the president's role as commander-in-chief, military vehicles are used exclusively for international travel; however, the civilian secret service drives the president's motorcade. The secret service prefers to transport the president via air (Air Force One and Marine One) if the road trip requires more than 30 minutes . Air Force One is the official air traffic control call sign of any United States Air Force aircraft carrying the President of the United States.