Gettysburg, Ronald F. Maxwell's re-telling of four hot days during the summer of 1863 (based on the Pulitzer Prize winning novel The Killer Angels by Michael Shaara), is a spectacle that gathers power and momentum with every scene. Originally slated as a TNT mini-series, Gettysburg received the go-ahead for a theatrical run when Ted Turner realized the quality of the material he had on his hands. Those who are not daunted by the running time (two-hundred thirty-four minutes, easily the longest general release motion picture in a long while) and decide to see the film on the big-screen will…