“This wasn’t a coincidence, this was triple sabotage at the UN. They ought to be ashamed of themselves.”   US President Donald Trump has demanded an investigation after his visit to the United Nations General Assembly on Wednesday.   In a post on social media, the US president referred to an escalator abruptly stopping as he and First Lady Melania Trump stepped on, a teleprompter malfunctioning during his speech, and an audio issue in the auditorium.   A UN official said the sound system was designed to allow people to hear translated speeches through earpieces.   It also previously said a safety mechanism might have been triggered by Trump’s videographer who had been travelling backwards up the escalator, while the teleprompter belonged to the US delegation.   Tap the link in BBCNews’s bio to read what members of Trump’s cabinet said about the visit.   #Donald Trump #BBCNews