I'm off to a training course in the US on Wednesday, flying 10.30am. My tickets were booked by the trainer and at the time I checked whether I needed a visa or qualified for visa waiver, and was told visa waiver was fine. I didn't realise you had to complete the waiver 72 hours in advance - I have just done it and it says my application is pending, and I am panicking I will not get it before I travel. I think it could be because I am going to do journalism training which may have rung some bells. If it doesn't arrive in time will I not be allowed to board the flight? Is there anything else I should do? I haven't travelled to the US (or anywhere) for years and back then you just filled in a form on the plane.