Ex-officials warn retrofitting work on luxury jet to install necessary security sytems could not have been completed within a year, leaving the presidential plane potentially vulnerable to attack

When President Donald Trump departed Turkey this week, he boarded a 35-year-old modified Boeing 747, not the newly converted plane parked across the tarmac that had been introduced with much fanfare just days earlier.

Air Force One’s longtime Boeing 747 gets an emotional 'last ride' sendoff as new presidential jets prepare to enter service this summer.