Robert Marquez set up 67 crosses for each life lost, and people are showing up to pay their respects by bringing flowers and other items to the site.

There were no survivors after an American Airlines regional jet with 64 people aboard collided with a Black Hawk military helicopter moments before the airplane was set to land at Washington, D.C.'s Ronald Reagan Washington National Airport on Wednesday night, officials said. The accident was the worst air disaster in the U.S. since 2001.