Other photos showed the men playing with their children, riding bikes, carrying crew members on their backs, hanging out at camp and in close encounters with fire.
Biden offered the families some solace as he wrapped up his remarks.
"As unbelievable as it is to even fathom ... the day will come when the memory of your husband, your son, or your dad or your brother will bring a smile to your lips before it brings a tear to your eye," he said. "My prayer for all of you is that that day will come sooner than later, but I promise you as unbelievable as it is, it will come."
Biden met privately with family members after the memorial.
Associated Press writer Bob Christie in Phoenix contributed to this report.