Confusion reigned at airports around the world Sunday over exactly which citizens from the seven nations subject to President Donald Trump’s immigration ban are still permitted to fly to the U.S. Airlines at international hubs from Dubai to London Heathrow were grappling with the implications of three court rulings in the U.S. Saturday and Sunday that have temporarily blocked the enforcement of parts of Trump’s executive order. In the hours after the presidential edict, many airports imposed blanket bans on U.S. travel for citizens of Iran, Iraq, Libya, Somalia, Sudan, Syria and Yemen, with Amsterdam Schiphol turning away seven people with valid visas, and Cairo denying boarding to migrants accompanied by United Nations officials.