WASHINGTON — Security lines at the world’s busiest airport stretched for five hours on Sunday as the TSA crisis escalated over the weekend. Transportation Secretary Sean Duffy predicted that massive waits at airports across the country are about to “get much worse” due to the partial shutdown of the Department of Homeland Security. Lines stretched around the building at Atlanta’s Hartsfield-Jackson International Airport on Monday. And TSA agents told travelers that the wait for some areas at the airport — which handled 106 million travelers last year — was five hours, according to the Atlanta Journal-Constitution. Nearly 400 TSA workers...