About 100 people participated in Friday’s 40 for 40 march. The march — which took place on the 19th anniversary of 9/11 — commemorated the 40 people who lost their lives in Flight 93, as well as the football jersey number of Marquis Jaylen Brown, Dannielle Brown’s son.

[Read: ‘Until my last breath’: Dannielle Brown leads march across Pittsburgh college campuses]