Each year a friendly competition brings out thousands to contribute blood to support the local blood bank.

This is the 20th Annual Heroes Behind the Badges Blood Drive.

Donors can donate blood and either Sanford USD Medical Center or Avera McKennan Hospital and designate their blood donation to either the Sioux Falls Police Department or Sioux Falls Fire Rescue department.

The department with the most donations will contribute $700 to the charity of their choice.  Learn more here.

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