The premiere of JFK in Fort Worth on April 23 is a big step forward for composer David T. Little and librettist Royce Vavrek--who made a splash in contemporary opera circles with their post-apocalyptic DOG DAYS--as their first 'grand' opera. It's also a major leap for American Lyric Theater (ALT), and its founder and artistic director, Lawrence Edelson, which co-commissioned the work with the Fort Worth Opera.