A Sailor hoists the "Navy Jack" aboard the Salt Lake City in memory of the September 11 attacks on America. Under direction of the Secretary of the Navy, Gordon R. England, all U.S. Navy ships will fly the ?Navy Jack? in place of the ?Union Jack? for the duration of the war on terrorism. The ?Navy Jack? is a flag consisting of a rattlesnake superimposed across thirteen horizontal alternating red and white stripes, with the motto, ?Don?t Tread on Me.? U.S. Navy photo.