After the U.S. airstrikes crippled Iranian nuclear sites on Saturday night, a travel security expert said it is imperative for Americans to have a plan to escape to safety in the event of an attack on a travel hub. Robert McDonald was a Secret Service agent for more than 20 years and is an expert in executive protection, intelligence and protective travel logistics. During that time, he coordinated security for U.S. and foreign dignitary visits. Now, he is a professor of criminal justice at the University of New Haven. "There are those type of areas where people are coming and going. People are