Remembering the Father I Never Met: A 9/11 Memorial

10 years after the tragedy of 9/11, children remember the fathers they lost

Robyn Higley, 9

Robyn wears a special necklace with a picture of her father, insurance executive Robert Higley, who passed away at 29 from the attack on Tower 2. She and sister Amanda, 14, live with mom Vycki and stepdad Rick. "I would have loved to have known my daddy, Rob, but I've always felt that I have a dad," Robyn tells PEOPLE. "It's just more family for me to love."