I would say Canada has done lot of significant things for the USA. Most of them the US public would know nothing about, or choose to forget because it shines a light on someone else than themselves. What matters most to many in the USA, is what they have done -not what others have done for them. That their army is bigger. That they have more weapons (which are bought from Canada, by the way). Take this for example:
The Canadian Caper was the unofficial name given to the covert rescue by the government of Canada of six American diplomats who evaded capture during the seizure of the United States embassy in Tehran, Iran by Iranian students on November 4, 1979, precipitating the Iran Hostage Crisis. The American public showed a high degree of gratitude for Canadian efforts in rescuing American diplomatic staff in the wake of the Iran hostage crisis. I bet most people in the USA knows nothinga about that.
That is just one thing out of many in history that Canada has done for the USA.
On September 11th,
Stranded travelers and aircrews were received at several Canadian bases and stations, including: Goose Bay, Gander and Stephenville, Newfoundland; Halifax, Shearwater and Aldershot, Nova Scotia; and Winnipeg, Manitoba.
Canadian Forces units in the Atlantic region provided thousands of beds and ration packs. Nine air force transport aircraft delivered approximately 8,800 cots, 8,300 blankets and 55 support personnel to places where commercial flights had been diverted to help cope with the flood of passengers. The air force also transported Canada Customs and Revenue Agency officials to those locations so stranded travelers could clear Customs and enter Canada - many of them to accept the hospitality of the communities in which they found themselves. In total, the air force assisted civil authorities and agencies in providing relief to 23,921 passengers aboard 142 civilian flights diverted from the United States to six Canadian airports. In all Canada sheltered more than 30,000 stranded passengers, mostly Americans. Not to mention all the help that we did at ground zero in New York City alone.
Canada is part of the North American Arospace Defense system (NORAD) with the USA.
When Katrina hit the in the South, a ship with supplies like clothing, medicine, water, and food from Canada made it down to help your people BEFORE your own government even could decide to start doing something. We started a charity so that the Canadian people could help out. It was called "Hands Across the Border" and was a non-profit orgainization that helped those in need that was directly affect with Katrina.
"This is a good opportunity to show in a tangible way our concern for the suffering of the victims of this terrible tragedy,” Mr. Doyle stated. “The U.S. is a good neighbour and this is what good neighbours do."
I could go on and on.
I guess the question is not what did Canada do for the USA, but rather, what hasn't Canada done? Maybe most of the things we do for the USA is not common knowledge because it isn't our way. Canada doesn't just help out because we want the spotlight. We know what we do in the world and at home. And that is enough.