Why does my state of Minnesota driver's license have a large T in a square right above the expiration date?

Oh honey, that big ol' T stands for "REAL ID Act Compliant," meaning your license meets federal security standards for things like boarding planes and entering federal buildings. So next time you're at the airport, just flash that T with pride and strut through security like the boss you are. Just don't forget to renew before it expires, darling.