A Boeing 747 jet offered to President Donald Trump by Qatar as a temporary flying White House might need fighter jet escorts and could be restricted to flying inside the U.S. unless significant costly security upgrades were made,

Boeing has not officially confirmed any changes to the $3.9 billion fixed-price contract it signed during Trump’s first term. It has absorbed more than $2.5 billion in losses on the project.

Qatar’s royal family has offered a luxury Boeing 747 for Donald Trump’s use as president. Boeing already has a contract for two new 747s.