First Cannon Fire of Civil War Secession

A Charleston, SC antique dealer discovered what appear to be metal filings along with a note that suggests they were from a Charleston cannon that fired the shot that began the Civil War. Could these shavings come from the cannon that sounded the first volley in the fight for southern secession? Follow Elyse Luray to Ft. Sumter as she tries to match metal shavings to the right Civil War cannon.