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https://www.cbc.ca/news/politics/afghanistan-second-military-flight-1.6148742
''Why Canadian flights are carrying fewer passengers than others
A senior official said the Canadian military flights leaving Kabul are being loaded to capacity, although the Canadian planes are carrying fewer passengers than some aircraft operated by the U.S. military.
An official said Canadian planes are not refuelling at the Kabul airport, which means they have to land and take off with more fuel in their tanks, limiting the number of people the planes are able to carry.''
"They're landing heavy and taking off heavy," the official said.
Other allied flights have been able to carry more passengers because they can refuel in mid-air after taking off from Kabul, or because they have shorter journeys to their stopover destinations.
Some passengers on Canadian flights are sitting on the floor and are not wearing seatbelts, the official also said.
Afghan refugees boarding planes are no longer required to hold valid passports before leaving the country. Ottawa said that requirement had been imposed by the Afghan government but can now be waived since the government has fallen.''