US President Donald Trump said that the Qatari-donated jet that served as an Air Force One plane would soon be sent away for upgrades, following questions about the plane’s security features.Trump started flying aboard the jumbo jet on July 1 after accepting the plane as a gift last year, when an accelerated effort to renovate the Boeing 747 for presidential use began.But Trump unexpectedly ditched the plane on a flight from Turkey to the United Kingdom amid rising hostility with Iran on...