On the cover: Pictures of victims of the Sept. 11, 2001, terrorist attacks form a mosaic image of the World Trade Center towers. As the country marks the 25th anniversary of the attacks, we ask once again: Where was God? On Page 10, Elise Ureneck reflects on the ways that day changed her generation of Americans — and her own relationship with God. On Page 12, Kimberley Heatherington recalls the courageous witness of Catholics on the front lines during and after the attacks.