The tempestuous career of formidable Hollywood star John Travolta decisively discredits the old adage that there are no second acts. The New Jersey native first gained fame as a suave, dim-witted, Brooklyn high school student on the sitcom "Welcome Back, Kotter" (ABC, 1975-79). Being in the right place in the right era, he became inextricably linked to pop culture trends, thanks to sensational starring roles in the disco drama “Saturday Night Fever” (1977) and the 1950s retro musical, “Grease” (1978). Travolta also had a hand in the country music revival of the early 1980’s with his popular