The fire on the 57 bus in Oakland

Dashka Slater:

It was close to 5 o'clock on the afternoon of Nov. 4, 2013, and Sasha Fleischman was riding the 57 bus home from school. An 18-year-old senior at a small private high school, Sasha wore a T-shirt, a black fleece jacket, a gray newsboy cap and a gauzy white skirt. For much of the long bus ride through Oakland, Calif., Sasha — who identifies as agender, neither male nor female — had been reading a paperback copy of "Anna Karenina," but eventually the teenager drifted into sleep, skirt draped over the edge of the bus seat.

As Sasha slept, three teenage boys laughed and joked nearby. Then one surreptitiously flicked a lighter. The skirt went up in a ball of flame. Sasha leapt up,…