In what may be the most valuable gift ever extended to the United States from a foreign government, the Trump administration is preparing to accept a super luxury Boeing 747-8 jumbo jet from the royal family of Qatar -- a gift that is to be available for use by President Donald Trump as the new Air Force One until shortly before he leaves office, at which time ownership of the plane will be transferred to the Trump presidential library foundation, sources familiar with the proposed arrangement told ABC News. The gift is expected to be announced next week, when Trump visits Qatar on the first foreign trip of his second term, according to sources familiar with the plans. Trump toured the plane, which is so opulently configured it is known as "a flying palace," while it was parked at the West Palm Beach International Airport in February.