Saudi F-15 fighter jets escorted Air Force One as before U.S. President Donald Trump landed in Saudi Arabia for a visit in the foreign country on Tuesday

The two planes currently used as Air Force One have been flying for nearly four decades, and Trump is eager to replace them. During his first term, he displayed a model of a new jumbo jet in the Oval Office, complete with a revised paint scheme that echoed the red, white and dark blue design of his personal plane.

The Constitution bars federal officials from accepting gifts from foreign states without the consent of Congress.

President Donald Trump defended Qatar gifting the U.S. a jet to use as Air Force One as the new fleet is still under construction.

The Trump administration is preparing to accept a superluxury Boeing 747-8 jumbo jet from the royal family of Qatar as a gift to be used by President Donald Trump as the new Air Force One for presidential travel until shortly before Trump leaves office, according to four sources familiar with the planning.

Upgrading a Qatar-donated 747 into a new Air Force One would take a large sum of money and years to complete, aviation experts said.

The Saudi investment forum played two of America's unofficial anthems as entrance music for President Trump's remarks: the theme song from the movie "Air Force One" and Lee Greenwood's "God Bless The USA.