This Tuesday, "Frontline" takes a look at the U.S. health care system by comparing what we have against other countries who manage to provide better access and produce better outcomes at a lower cost. Here are three preview clips:Here's the press release on the program:FRONTLINE presentsSICK AROUND THE WORLDTuesday, April 15, 2008, at 9 P.M. ET on PBSFRONTLINE TRAVELS TO FIVE COUNTRIES IN SEARCH