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Fox Corporation announced it will be making a $1 million donation to the Tunnel to Towers Foundation, a non-profit organization that honors fallen firefighter Stephen Siller, who sacrificed himself to save others on Sept. 11, 2001. Saturday marked 20 years since the terror attacks that forever changed America.

The donation will support injured first responders, military heroes and their families.

Tunnel to Towers CEO Frank Siller, brother of the fallen 9/11 hero, joined "The Five" Saturday to remember Stephen's sacrifice and to react to the donation. Although he had just completed a 537-mile trek through six states in six weeks as part of the Tunnel to Towers Foundation's "Never Forget Walk," after hearing the news he said he felt "a million times better." 

"I don't know what we would do without Fox, and that is the absolute truth," Siller added Sunday on "Fox & Friends," noting that the money will help his organization pay off some mortgages of those who died from 9/11 illnesses.

20 YEARS SINCE 9/11, TUNNEL TO TOWERS CEO FRANK SILLER COMPLETES 537-MILE ‘NEVER FORGET WALK’

On the morning of September 11, Stephen Siller was driving home from an overnight shift. He had planned to spend the day golfing, but after hearing the news he headed toward the Twin Towers. The entrance of the Brooklyn Battery Tunnel was closed, so he instead ran to the scene with his 60 pounds of gear. Siller is survived by his wife Sally and five children. 

Frank Siller recently completed his 537-mile walk through six states in six weeks as part of the Tunnel to Towers Foundation's "Never Forget Walk." He began at the Pentagon, made his way to Shanksville, Pennsylvania, and on Saturday finished the walk by retracing his brother's footsteps in lower Manhattan.

To retrace his brother's steps, Siller said, "meant everything in the world" to him.

Siller continued his efforts by honoring the lives of those who died from 9/11 related illnesses, who he called "9/12 families," by reading out their names on Sunday. They too deserve to be remembered, he said, noting that they died from the same terror attack as his brother.

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"He was a dynamic human being," Siller said of Stephen.