Thirty-five years ago two men were entombed under tons of rock when a section of the Penmanshiel rail tunnel, near Grantshouse, collapsed.
The fall-in occurred on March 17, just before 4am, as engineering work was underway in the tunnel.
One survivor, among nine who escaped, described a frightening rumble before the tunnel began to cave in. Rescue efforts had to be abandoned as more and more debris crashed down onto the east coast railway line.
The two men who tragically lost their lives were Peter Edgar Fowler of Eyemouth and Gordon Turnbull from St Boswells.