I will simply say that the circumstances on the ground were deteriorating rapidly. Canada's evacuation efforts were contingent upon U.S. military control of the airport. We stayed for as long possible, and evacuated as many people as possible, in the face of a quickly devolving security situation. In fact, Canada was among the last to leave and to cease operations ahead of the U.S. military completing its withdrawal on August 30.
On May 9th, 2022. See this statement in context.