http://metro.co.uk/2015/12/23/british-father-speaks-about-how-his-muslim-family-was-barred-from-going-to-disneyland-5582203/"A British father today told how his family, including nine children, were banned from flying to the US because they are Muslim.
Mohammad Tariq Mahmood, 41, his brother and their children, aged between eight and 19, were stopped at the departure gate at Gatwick airport by a UK Border Agency official and told their
visas to the US had been revoked.
They were given no explanation why their ESTA
visas, organised six weeks before the flight, were cancelled. ..........."
Is "ESTA" a kind of visa? 