Flown by the first American Navy as it assembled under Commodore Esek Hopkins; the legendary First Navy Jack has since been a symbol of the American Navy. The traditional thirteen stripes are crossed by a Timber Rattlesnake; which was especially significant inthe American Revolution; as it became an avatar for the Colonial attitude. The snake does not strike unless provoked; and gives warning first with its rattle; which shown on the flag has thirteen layers. The bold words; DonGt Tread on Me reiterate the pointand ensure that it is understood. Currently; in accordance with the orders of Secretary of the Navy; all U.S. ships are to fly theFirst Navy Jack for the duration of the War on Terrorism; in honor of those killed on September 11; 2001.