Today is the first day of Real ID enforcement at airports across the U.S. Here's what travelers have to know before taking to the skies.

Real ID enforcement began on Wednesday. One place you will need the new identification card is at the airport, and all signs at Pittsburgh International pointed to a smooth first day. KDKA-TV's Chilekasi Adele has more.

Travelers arriving at Pittsburgh International Airport Wednesday without a Real ID or another acceptable form of identification should prepare for possible additional screening. Starting Wednesday, federal Real ID requirement goes into effect and will be enforced by TSA agents at airports across the country.