What is this Article primarily about? Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selectedAThe children of fallen 9/11 firefighters who have grown up to become firefighters themselves BThe new insight Manny Mojica has into what his father's life was like at his demanding job CThe strong connection Pete Carroll felt to firefighting when he was in the third grade DThe hundreds of first responders who died helping others at the Twin Towers on 9/11