Audio Was Cut, Valedictorian Says, at Mention of 'Tamir Rice'

"To the kids that were murdered in senseless mass shootings; to Trayvon Martin, Tamir Rice, and all the other children who became victims of injustice," a high school valedictorian in Dallas began saying Saturday. Then her microphone was cut, NBC reports. Rooha Haghar tweeted an account and a video, which...