NEW YORK (AP) — President Barack Obama has honored the memory of a young man who saved others before losing his own life at the World Trade Center.

To many who were there, Welles Crowther was known simply as "the man in the red bandanna."

Obama says the 24-year-old equities trader wore the red handkerchief over his nose and mouth while calmly leading survivors down the stairs to safety.

He carried one woman on his shoulders down 17 flights.

Obama says Crowther represents the "true spirit" of 9/11 — love, compassion and sacrifice.

Alison Crowther hopes that when 9/11 museum visitors see her son's bandanna, they will be inspired to help others "in ways both big and small."

By her side was a woman he rescued, Ling Young. She wanted to thank his parents.