The role of Lt. Dan changed his life. But long before the release of ‘Forrest Gump,’ actor Gary Sinise had a deep appreciation for the nation’s military veterans. Gary talks about growing up in Highland Park, co-founding Steppenwolf Theater, and the incredible work he’s doing with his Gary Sinise Foundation. Gary also talks about the painful loss of his son, his latest mission to keep Mac’s legacy alive, and the WWII book we both think everyone should read.