In 2013, the Department of Homeland Security announced the Real ID Act, an attempt to increase security by requiring all licenses to be equipped with machine-readable technology, which typically comes in the form of a chip.

The IDs being issued in most states now are considered non-compliant.

According to "Phase 4" of the Real ID Act:

A driver’s license or identification card from a noncompliant state may only be used in conjunction with an acceptable second form of ID for boarding federally regulated commercial aircraft.

This means simply producing your license will not be enough to board a plane. A secondary form of ID includes a passport, which only about 40% of Americans have.

New Jersey is among the states that have an extension, letting Federal agencies accept driver's licenses until October 10, 2016.