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Good morning.

Here’s what you need to know:

Horror story replays as America reloads

• “Deadly shootings in schools — that is, the killing of children in sanctuaries of learning — have become a distinctly American ritual,” our columnist writes, “the rote responses as familiar as a kindergarten recitation of the Pledge of Allegiance.”

Our live briefing has the latest on the aftermath of Wednesday’s attack at a high school in Parkland, Fla., which killed 17 people.

Here’s what we know about the victims. At a vigil on Thursday, a woman said of her daughter, “I hope she didn’t die for nothing.”

The suspect, Nikolas Cruz, 19, has confessed to the shootings. Neighbors and classmates described him as emotionally troubled, although he had no criminal history.