More than 75 years after Flag Day became U.S. law, the stars and stripes grab our gaze these days in constant portraits of how Americans see their country’s promise — sometimes dotted along historic graves of military veterans, draped upside down over a protester, or painted on a barn.

What's the history behind the American flag? What do the different colors of the flag represent? Here's what we know about Flag Day.

More than 75 years after Flag Day became U.S. law, the stars and stripes grab our gaze these days in constant portraits of how Americans see their country's promise — sometimes dotted along historic graves of military veterans,