At about 9:30 at night on July 25, 1976, Plummer scaled the White House fence, armed with a piece of pipe. While advancing towards the White House, he was ordered to stop by a Secret Service officer.
On July 25, 1976, around 9:30 PM, Plummer scaled the White House perimeter with a piece of wood in hand. He was directed to stop by a Secret Service official as he neared the building.