美国五十个州,每个州的汽车牌照长相各不相同。下面这张图就是Mike Wilkins收集的50个州的汽车牌照。这幅作品非常有名,因为综合在一起,它们构成了美国宪法的“前言”(Preamble):"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.”