Her name was Debra Campbell, 49, she said, and she walked not for their cause – she hadn't heard about the plane crash that killed all but six of the 77 people on board, mostly members of the Brazilian soccer team Chapecoense – but because she lost her son a few months back. Someone gave her a candle surrounded by a plastic cup and stopped to light it. She returned the favor, tilting her candle just enough to light another.