Americans have the shortest vacations of any rich country. And they are actually getting even shorter. The US is one of only five countries in the world -- the others are Burma, Nepal, Suriname and Guyana -- which have no law guaranteeing any paid vacation time for workers. The average US vacation is a bit over two weeks, while the median is only about a week, and American workers give back about three vacation days every year. Europeans enjoy five or six weeks of vacation each year and are healthier than Americans. Vacations matter -- for productivity, happiness, family bonding and especially, health. Men who don't regularly take vacations are a third more likely to suffer heart attacks than those who do; women are fifty percent more likely, and far more likely to suffer from depression. Making the case for more vacation time are: Shelton Johnson, a ranger naturalist in Yosemite and a "star" of Ken Burns' National Parks series; Rick Steves, the world's best-selling travel writer; and Sara Speck, cardiologist and director of a cardio-vascular wellness program, who tells patients to "take two weeks and call me in the morning."