When Gary Sinise signed on to act in Forrest Gump 20 years ago, he didn't know his character, Lt. Dan, would still be meaningful to so many people all these years later. "There was no way I could predict that playing that character would evolve into something that's much bigger than a movie." Sinise will be in Arlington Heights on Sunday for a full day of fundraising for veterans through The Gary Sinise Foundation at Arlington International Racecourse's First Responders Day.