It’s going to be crowded at airports and on the road this Memorial Day weekend. Americans were hitting the road in near-record numbers at the start of the holiday weekend. More than 1.8 million people went through U.S. airports on Thursday, and that number could top 2 million over the weekend, the highest mark since early March of last year. Homeland Security Secretary Alejandro Mayorkas is warning travelers to expect long lines at airports. AAA expects a 60% jump in travel over Memorial Day last year despite higher prices for airline tickets, gasoline and hotels.