Linda Corbitt of San Francisco was walking to the Javits Center with her daughter when she heard the race was scrapped. Corbitt has leukemia and her daughter planned to run to raise money for a cure.
"I'm sad for the people who trained so hard for many, many months but we understand why the decision was made," Corbitt said. "A lot of people are in pain."
Associated Press writers Cara Anna, Rachel Cohen, Verena Dobnik, Melissa Murphy, Jennifer Peltz, Christina Rexrode and Michael Rubinkam, AP video journalist Ted Shaffrey and researcher Lynn Dombek contributed to this report.