Believe it or not, there was a time when a driver's license was nothing more than a piece of paper with an actual paper photo glued on that got laminated. No magnetic strips, barcodes, holograms, or fancy security features. After the 9/11 attacks, the federal government passed the REAL ID Act, which required state IDs such as driver's licenses, to comply with new security measures to protect against counterfeit forms of identification.
While the REAL ID Act was passed in 2005, there are still five states that have not complied, which will cause serious inconvenience for residents of those states. For example, the Pennsylvania driver's license won't be enough to board a plane in 2018.