Watch this video. A few minutes is not too much to ask to honor their service and their sacrifice so that we may grill hot dogs and take a three day weekend in peace.
The year after The Godfather, Al Pacino made this hard-hitting movie about corruption in the NYPD. It's a real slice of 70s movie making and a classic you should see.
If you've only ever seen this classic on tv, you need to see it on the big screen. I'm warning you, however, the shadow-beings will scare the hell out of you.