NATO as it exists today has over ever been called NATO. However, a precursor to NATO, which did not include the USA, was the Western Union Defence Organisation, a defence council set up by the UK,...
NATO does not have a president. It's acting head is the Secretary General. The current Secretary General is Anders Fogh Rasmussen, former prime minister of Denmark.
NATO is made up of military from the United States and a bunch of countries that are useless and joined so the US would protect them. This is true with the exception of the Ausies who kick butt.