White House officials bade farewell on Thursday to one of the two jets that have been used to transport US presidents for more than 30 years.The goodbye messages fuelled speculation that a Boeing 747 controversially gifted to US President Donald Trump by the Gulf emirate of Qatar is now set to enter service.“‘Well done, good and faithful servant. ‘The Last Ride,’” Trump’s communications director Steven Cheung said in a post on social media with a picture of the iconic white and blue jet after...