The Cowboys invited families of fallen police officers from the ambush in Dallas earlier this month, as well as Dallas Police Chief David Brown and Mayor Mike Rawlings.
The team walked onto the field with linked arms of those invited to kick off camp. See video of the team and those directly affected by the ambush right here.
SportsDay's Brandon George got a chance to speak with Valerie Zamarripa, who is the mother of fallen officer Patrick Zamarripa.
I just spoke with Valerie Zamarripa, the mother of fallen Dallas police officer Patrick, who said she was in tears coming out onto field.