In most places it was too hot for hooded sweat shirts. So they came with T-shirts.

In Washington, Elaine Morris showed up in one bearing a picture of slain teenager Trayvon Martin alongside members of the Ku Klux Klan, with the slogan, "Which hoodie looks suspicious?" In Chicago, CeCe Fannin handed out white T-shirts emblazoned with the words, "I mean no harm," for black youth to wear, she said, to make clear they are not a threat.

In cities around the United States, demonstrators gathered in support of the unarmed black teen in the now-iconic hooded sweat shirt whose shooting death in Florida last year inflamed racial tensions and raised questions about whether black young men are viewed more suspiciously than their peers of other races or ethnicity.