A couple of weeks ago, I saw a stranger crying in public. I was in Brooklyn's Fort Greene neighborhood, waiting to meet a friend for breakfast. I arrived at the restaurant a few minutes early and was sitting on the bench outside, scrolling through my contact list. A girl, maybe 15 years old, was sitting on the bench opposite me, crying into her phone. I heard her say, "I know, I know, I know" over and over.


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