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Ben Brewer, Deseret News
The color guard stands at the ready during a memorial service and dedication of a monument honoring 12 Army Rangers and Air Force special operations troops who were killed in a helicopter crash during training near Antelope Island 20 years ago, Saturday, Oct. 27, 2012.

ANTELOPE ISLAND STATE PARK — A memorial service and rededication of a monument were held Saturday, honoring 12 Army Rangers and Air Force special operations troops who were killed in a helicopter crash during training near Antelope Island 20 years ago.

Monday is the anniversary of the accident.