 The cannon firing demonstrations will take place on Saturday at 10 a.m., 11.30 a.m., and 2 p.m., and 3.30 p.m. On Sunday at 11 a.m., 1 p.m., and 2.30 p.m. Each program is going to last approximately 20 minutes and interpret the weapons, projectiles, and procedures Civil War artillery crews used during the war. Now, the Parks Visitor Center will be open during...