Classic aircraft kept in flying condition

Did you know there's a Commemorative Air Force?

From its website:

The CAF was founded to acquire, restore and preserve in flying condition a complete collection of combat aircraft which were flown by all military services of the United States, and selected aircraft of other nations, for the education and enjoyment of present and future generations of Americans.

Also from its website:

“A generation which ignores history has no past and no future” – Robert Heinlein

hat tip: Public can view, fly in restored Flying Fortress » RapidCityJournal.com (June 12, 2008)