The Transportation Security Administration (TSA) said 81 percent of air travelers already present forms of identification that comply with Real ID requirements, which went into effect Wednesday. A

The long awaited deadline for the REAL ID requirement at U.S. airports has arrived, but passengers without the security measure on their identification can still pass through security, but with a catch.

Wednesday is the day Real ID enforcement start for domestic travel, those without face additional screening by everyone should be able to fly, but TSA officials said.