BISMARCK, N.D. (AP) —  Three people killed in an air ambulance crash in North Dakota have been hailed as “heroes of the impossible.”

A crowd estimated at up to 1,500 attended a memorial for the victims Monday at the Bismarck Event Center.

The Bismarck Tribune reports members of dozens of North Dakota ambulance services, police and fire departments slowly filed past the front of the memorial for paramedic Chris Iverson, nurse Bonnie Cook and pilot Todd Lasky.

The Rev. Greg Carr of Crisis Care Chaplaincy spoke of the coming together of hospitals, law enforcement, fire and rescue and emergency medical personnel he’s seen in the week since the crash.

The air ambulance was flying to Williston to pick up a patient when it crashed into a farm field shortly after taking off from Bismarck on Nov. 18.

Previously…

BISMARCK, N.D. (AP) — The three people killed in an air ambulance crash in Morton County will be remembered at a public service Monday.

A joint celebration of lives will be held at 10 a.m. at the Bismarck Event Center for pilot Todd Lasky and nurse Bonnie Cook, both of Bismarck, and paramedic Chris Iverson, of Mandan. Doors open at 9 a.m.

Lasky and Iverson worked for Bismarck Air Medical and Cook for CHI St. Alexius Health.

The Bismarck Air Medical Plane crashed in a farm field shortly after takeoff from Bismarck late Sunday. It was flying to Williston to pick up a patient. There were no survivors.

Gov. Doug Burgum directed state government agencies to fly the U.S. and state flags at half-staff last Wednesday in honor of the victims.