What to know

• The U.S. President’s warning came as investigators worked to determine why the FlyDubai copilot stabbed the captain, causing the jet to plummet before passengers intervened and the plane landed in Saudi ArabiaS1
• Trump issued the warning as investigators worked to determine why the copilot stabbed the flight's captain, causing the FlyDubai plane to plummet before others on board stopped the attack and landed the airliner in Saudi ArabiaS2
• US President Donald Trump said on Thursday that if Iran is linked to the copilot who tried to crash an Israel-bound flight, the Islamic Republic would be struck ‘very hard’ for the attempt on the lives of more than 180 persons aboard the jet. Trump issued the...S3