Barack Obama, the 44th president of the United States, walks onto the stage.
The delegates are on their feet and cheering.
Belkofer says, "Some people in this world make big differences. My son Tom made big differences. The president continues continues to make big differences – and smaller ones, too. Like the inspiration he poured into me – so that I might make a difference of my own.
"I wish every American could hug President Obama so that they could see the good in his eyes and the warmth in his heart. This is our president!" she says, introducing a video about Obama's eight years in office.
The crowd cheers, some are shown with tears in their eyes.