Starting Wednesday, most U.S. travelers without a passport will be required to have a REAL ID to board domestic flights. After more than a decade of warning this day would come, the Transportation Security Administration says every flier over the age of 18 will need the security-enhanced REAL ID or an approved alternative,

Laura Hruby, director of Consular Affairs at the State Department's Office of Public and Congressional Affairs, discusses the looming May 7 Real ID deadline.

Nearly one-fifth of passengers still don't have a Real ID. If you don't have one but are flying soon, here's what to do and what airlines are saying.