Fans Gather Worldwide To Welcome Jackson Film.

Is this it? That's what Gregory Parrott, 62, was wondering late on Tuesday night as he waited at the head of a short line for a midnight screening of the new Michael Jackson documentary, ''This Is It,'' at the AMC Magic Johnson Theaters in Harlem. The Apollo Theater, where thousands gathered to mourn Mr. Jackson after his death on June 25, is a stone's throw away, but for opening night, this theater was far from sold out. [ABSTRACT FROM PUBLISHER]