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On September 11, 2001, the unthinkable forever alters New York City’s skyline. In the wake of the devastating World Trade Centre attacks, for the very first time at 9:45 a.m. (ET) the FAA orders American airspace completely shut down.

More than 4,500 domestic and international flights carrying nearly 1,000,000 passengers over the United States, or heading to it from overseas, either must land without delay at the nearest airport or be diverted to Canada.

America’s closest ally, with remarkable speed and resolve, launches Operation Yellow Ribbon.

Within five minutes, Canadian air controllers contact close to 500 trans-Atlantic and 90 trans-Pacific flights. Half turn back while the rest, over 230 airliners carrying nearly 33,000 passengers, descend on Canadian airports spread across the country.

At the height of the operation, commercial airliners are entering Canadian airspace at a rate of one to two per minute.

Against insurmountable odds, every aircraft safely lands during the most unprecedented air-traffic control feat ever executed.

Within less than four hours, all airliners have touched down at their designated Canadian airport, where complete strangers meet their passengers with open arms ready to shelter, feed and protect them.

map Whitehorse Yellowknife Vancouver Edmonton Calgary Winnipeg Toronto Hamilton Mirabel Dorval Moncton Halifax Goose Bay Gander Deer Lake Stephenville St. John's
Click on a location to see how many U.S.-bound planes were diverted there. Try to guess before you click!
Data According to Nav Canada
YXY
WHITEHORSE
2 FLIGHTS
WHITEHORSE
Wikimedia Commons (CC-by-3.0)
After a faulty transponder raises further hijacking fears, U.S. fighter jets intercept Korean Air Flight 85, forcing it to land in Whitehorse. Schools and large buildings are evacuated. RCMP board the airliner and later confirm that it was a translation misunderstanding.
YZF
YELLOWKNIFE
1 FLIGHT
YELLOWKNIFE
Getty Images
Residents deliver home-cooked meals and winter clothing, aware that many stranded passengers had only packed for warm southern destinations.
YVR
VANCOUVER
34 FLIGHTS
VANCOUVER
Wikimedia Commons (CC-by-4.0)
With so many stranded international passengers, translators from Vancouver’s immigrant communities help them to understand the situation they find themselves in.
YEG
EDMONTON
6 FLIGHTS
EDMONTON
Wikimedia Commons (CC-by-3.0)
Volunteers greet arrivals with applause. A moment many stranded passengers later describe as unexpectedly emotional after experiencing hours of fear and confusion.
YYC
CALGARY
13 FLIGHTS
CALGARY
Envato
As hotels overflow, Western Canadians swing open their doors, offering spare bedrooms, meals, and laundry services for the stranded passengers. Local churches quickly mobilize thousands of meals.
YWG
WINNIPEG
15 FLIGHTS
WINNIPEG
Wikimedia Commons (CC-by-3.0)
Families show up at the airport with handwritten signs saying “Room for 2” or “Room for 4” and willingly take in the displaced strangers into their homes.
YYZ
TORONTO
14 FLIGHTS
TORONTO
Getty Images
As Canada’s financial center, the city is on high alert as a potential target. Diverted passengers are carefully screened before stepping onto Canadian soil. Grassroots groups organize buses, food and translators.
YHM
HAMILTON
4 FLIGHTS
HAMILTON
Wikimedia Commons / Public Domain
Hamiltonians arrive with food, toys, and offers of showers. Stranded passengers remark that the kindness is overwhelming and something they have never experienced before.
YMX
MIRABEL
10 FLIGHTS
MIRABEL
Getty Images
Local volunteers entertain children with French games and songs, creating unexpected cultural exchanges. Montreal’s Jewish community cooks hundreds of kosher meals for observant stranded passengers.
YUL
DORVAL
7 FLIGHTS
DORVAL
Getty Images
Displaced passengers are grateful for the quiet calm demonstrated by their French-Canadian host in the face of the brutality less than 70 kilometres away in the United States.
YQM
MONCTON
10 FLIGHTS
MONCTON
Wikimedia Commons (CC-by-2.0)
Hundreds of locals rush to the airport with food, blankets, toys, toiletries, and phone cards for stranded passengers to call concerned loved ones.
YHZ
HALIFAX
47 FLIGHTS
HALIFAX
Courtesy of the Halifax International Airport Authority
With the largest number of diverted flights, the airport’s taxiways and military runways overflow with aircraft. Determined that no stranded passenger would go hungry, local families deliver hot meals to makeshift shelters in schools and community centers.
YYR
GOOSE BAY
7 FLIGHTS
GOOSE BAY
Wikimedia Commons (CC-by-2.0)
The first airport to receive a diverted flight. Its isolation intensifies the uncertainty among passengers. Locals race to organize donations of clothing and food.
YQX
GANDER
38 FLIGHTS
GANDER
Courtesy of the Town of Gander
Gander nearly doubles in size, as almost 7,000 passengers are stranded in a community of just under 10,000 residents. The SPCA rescue 19 animals, including dogs, cats and a pair of rare chimpanzees from cargo holds.
YDF
DEER LAKE
1 FLIGHT
DEER LAKE
Wikimedia Commons / Public Domain
Passengers only learn about the 9/11 attacks inside the terminal. The sudden realization triggers shock and disbelief. Locals open their homes and cottages turning stranded strangers into grateful houseguests.
YJT
STEPHENVILLE
13 FLIGHTS
STEPHENVILLE
Wikimedia Commons / Public Domain
A former Cold War U.S. Air Force base is pressed into service once again. Gyms and barracks transform into temporary shelters for displaced passengers.
YYT
ST. JOHN’S
21 FLIGHTS
ST. JOHN’S
Getty Images
Stranded passengers visit pubs and community halls where locals put on impromptu Newfoundland folk music concerts to lift their spirits. A stranded European couple marry, with locals attending the celebration.

Operation Yellow Ribbon was a logistical triumph. However, on a human level, it was something much rarer—a spontaneous act of humanity.

No one knew whether any of the diverted flights could be involved in additional hijackings. Yet, no one in Canada questioned whether we should help our closest friend to the south. Rather, the question was, how many can we take? Inclusion, not suspicion, ruled the moment.

The unwavering Canadian moral clarity during the 9/11 crisis is studied by behavioural scientists to this day, and remains a relevant model for present and future terrorist and humanitarian crisis response.

The kindness, generosity, and support Canadian communities, across the country, provided to the more than 33,000 stranded passengers had a profound effect on them. Many were inspired to take back the kindness and compassion they experienced to their own communities. And many remain connected to their host Canadian town decades later.

Riverbend Media
Canada
Canadian Geographic
Additional Photo Credits: Courtesy of the Town of Gander, Wikimedia Commons (Public Domain), and Getty Images.