Pat Tillman lost his life serving the United States 13 years ago on April 22, 2004.

The former Arizona State and Arizona Cardinal star was an Army Ranger and died in the mountains of Afghanistan of what was found to be friendly fire.

After his death, Tillman was awarded a Silver Star and Purple Heart.

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America remembered Tillman on the anniversary.

Today marks 13 years since we lost a member of our family and an American hero, Pat Tillman.

His spirit lives on through @pattillmanfnd. pic.twitter.com/b5egDe5SQc

— Arizona Cardinals (@AZCardinals) April 22, 2017

Today marks the 13th anniversary of Pat Tillman's death pic.twitter.com/VExwGtyJnP

— Sports Illustrated (@SInow) April 22, 2017

13 Years Ago Today. Pat Tillman Died in The Act Of Duty. Turning down an NFL contract to serve our country. He will Always Be Remembered. 42 pic.twitter.com/z2ctOFOlvc

— Sam Butler (@samuelbutler333) April 22, 2017

Honoring a hero, 4.2 miles at a time w/a few thousand peeps!! @ASU @pattillmanfnd #PatsRun2017 pic.twitter.com/JeTGIZfuah

— Susan (@SusanCadena) April 22, 2017

Absolute "sea of people" (28,000 strong) honoring one of the best men this country has ever known… PAT TILLMAN. #PatsRun2017 pic.twitter.com/FOwwCpw4L9

— Willie Bloomquist (@williebloom) April 22, 2017

Fun morning @pattillmanfnd Pats Run…honored to be a part of this special event! @TheFirstTee #42 #americanhero pic.twitter.com/015OJaVa9j

— TheFirstTeePhoenix (@TheFirstTeePhx) April 22, 2017

How great are the @FootballASU guys for cheering on the runners to finish strong ? #patsrun #godevils pic.twitter.com/SJbpgvtHST

— Pat Tillman Fnd (@pattillmanfnd) April 22, 2017

Thankful to have the Pat Tillman run in honor of his legacy pic.twitter.com/lCz3SaKnyj

— Sparky The Sun Devil (@SparkyArizonaSt) April 22, 2017

Our pack had a great morning running 4.2 for No.42 at #PatsRun! #CoyotesGiveBack pic.twitter.com/2j0s0zUdqp

— Arizona Coyotes (@ArizonaCoyotes) April 22, 2017

Thank you Pat Tillman for your wisdom and courage, for the example you set not just for athletes, not just for troops, but for Americans. pic.twitter.com/51bnezQYga

— Sean Doolittle (@whatwouldDOOdo) April 22, 2017

13 years ago today we lost Army Ranger Pat Tillman in Afghanistan. #PatTillman #ArmyRangers pic.twitter.com/V7pZavSxF3

— Liberty's Heroes (@LibertysHeroes) April 22, 2017

Pat Tillman gave up a multi-million dollar contract, in the @NFL, to serve his country. R.I.P you American patriot. pic.twitter.com/Fv6KCJYGcP

— Based Monitored (@BasedMonitored) April 22, 2017