I was in California on September 11, 2001. I was there for work in a hotel room getting ready to go to a conference the company I worked for was putting on. I heard someone pass by my hotel room door talking on a cell phone saying someone had flown a plane into the World Trade Center. By the time I turned on the television, the South Tower had already collapsed and a plane had already crashed into the Pentagon. I knew right away that our country was under attack and I felt helpless and angry. I watched the North Tower collapse in my boxer shorts with shaving cream all over my face.

My story is not unique. I’m among the millions of New Yorkers who watched savages destroy thousands of innocent lives and remake our skyline. But hand-in-hand with the horror and anger is the unrivaled admiration for the first responders that gave their lives and showed that people could be at their best when things were at their worst.

One of those first responders was Stephen Siller, a firefighter who ran through the Brooklyn – Battery Tunnel to get to the Trade Center on the day of the attacks and perished in the South Tower collapse.

This past Sunday I was among the more than 30,000 people who followed Siller’s footsteps in the Tunnel to Towers 5k.

The event loses none of its effect if you’ve done it before and if you haven’t done it, you should.

The run begins with a lot of waiting around. For an event this large, it is well-organized but it still means large, slow-moving crowds. The run ceremony began at 9 and the run officially starts at 9:30 a.m. I was in Wave C, the third wave of runners, and I didn’t cross the START line until 10 a.m.

First responder groups, corporate groups, school groups, teams of family members paying tribute to their fallen loved ones, college students there for fun and adventure—almost every kind of city denizen is present at the 5k. Firefighters come from all over the world to run in homage to Siller, many of them doing it in their heavy firefighting gear. This is no easy task in the Indian summer heat.

Standing around waiting in the hot sun will get you tired before the race begins, and then the Brooklyn Battery Tunnel is very hot and crowded. People who had every intention of running may find themselves on the sidelines walking, with others trying to get around them. It’s a bad jostle but a jovial one, with chants of U.S.A.! U.S.A.! breaking out spontaneously throughout the passage.

The Tunnel to Towers run and walk is perhaps the largest gathering in the city that can still generate massive amounts of goodwill and cooperation. Runners and first responders thanked one another. There were high fives and handshakes all around. Despite tens of thousands of people constantly bumping into one another and stepping on one another’s feet, I heard no harsh words uttered and saw no arguments; try finding that on your average subway commute.

The sacrifices of those who gave their lives on September 11, 2001 cannot be sullied by contemporary political strife or bent to serve a narrow purpose. These sacrifices are heroism in their truest and purest form, and the solemn honors we pay to those heroes help give our city a form of peace.

A friend who lost two cousins in the Trade Center attacks did the run today – and raised $10,000 for the Stephen Siller Foundation this year alone—had this to say afterward:

“Today I saw love and beauty, respect and pride, camaraderie and patriotism. I saw love. Everywhere. I didn’t see dissent. Hatred. Anger. I saw love. And for that, I’m truly grateful.”