Got this fronm an email group I belong to.
Flags bearing rattlesnakes and bearing the simple warning "Don't Tread on Me" were first flown on the first ships of the Continental Navy in the Delaware River in 1775. Today, as America faces unprecedented threats, this historic symbol of our founding has emerged as a reminder of our origin and true courage. The Secretary of the Navy, Gordon R. England, has ordered all U.S. Navy ships to fly the First Navy Jack in place of the Union Jack for the duration of the Global War on Terrorism.
Send a message to the world that America will stand up to its aggressors and preserve liberty. Here are some links for more info and places to buy a flag.
Premium Nylon 3'x5' First US Navy Jack Flag - First US Navy Jack Flags - NNJACK
First Navy Jack: Don't Tread on Me
Human Events Book Service: First Navy Jack Flag by Collectible