what countries do us citizens not need a passport?
['Blue _Pants _man _Pinones_ Puerto Rico © josue armando serrano/Flickr. ... ', 'US Virgin Islands: Trunk Bay; a dream beach @ St. ... ', 'Jamaica © 3dman_eu/pixabay. ... ', 'Diving near the Northern Mariana Islands © Michio Morimoto/Flickr. ... ', 'Guam © bangaichi/pixabay. ... ', 'American Samoa © Alan & Flora Botting/Flickr. ... ', 'Lava © WikiImages/pixabay.']