London’s Mayor Slams Trump Retort, Says ‘We Will Never Let These Cowards Win,

London's mayor defiantly declared that the city is open after a terrorist attack in the heart of the British capital killed seven people and injured dozens. "We are all shocked and angry today, but this is our city," Mayor Sadiq Khan said Sunday. "We will never let these cowards win, and we will never be cowed by terrorism."A short while later, U.S. President Donald Trump took to Twitter via IFTTT