Overview: Wednesday on NewsHour, we take a look at Ted Cruz's announcement that he will run for president; the first Republican to do so. Also: Yukiya Amano of the nuclear watchdog IAEA talks on the Iran deal, Shaken Baby Syndrome under scrutiny, Charlottesville police find no proof of UVA gang rape, how the First Amendment affects your specialty license plate, and Kodak's transformation in the digital age.