DENVER (CBS4) – The Fort Logan National Cemetery in Denver is hosting its annual Memorial Day Ceremony on Monday. It honors service members who have died in the line of duty.

Over 100,000 veterans are buried at the cemetery. Before the ceremony, volunteers put flags on every grave.

READ MORE: Anthony Martinez Arrested For First-Degree Murder In Death Of Roommate Shannon Ziel

The ceremony at Fort Logan began at 11 a.m.

Three generations of the Pareso family made spending Memorial Day at Ft Logan a tradition. It began with James Pareso and his son. Now, his grandchildren are old enough to understand the significance of this day.

“They put themselves before others in the war to help other people survive and live their lives,” said Jason Pareso.

READ MORE: Marmot Rescued Outside Steakhouse In Englewood After 'Hitchhiking' From Mountains

PHOTO GALLERY: Colorado Memorial Day Celebrations 2019

“We remember our family members who are deceased and were killed very near the end of World War II. One happens to be named Anthony Pareso. My son is named after him,” said James Pareso.

(credit: CBS)

Two other ceremonies will be held at Fort Lyon National Cemetery in Las Animas and Pikes Peak National Cemetery in Colorado Springs. Both events are scheduled for 11 a.m.

MORE NEWS: U.S. Health and Human Services Secretary Xavier Becerra Meets With Gov. Jared Polis

This year, President Donald Trump and Colorado Gov. Jared Polis have ordered flags on public buildings to be lowered to half-staff from sunrise to noon on Monday.