Dr. Martin Luther King Jr. would have turned 75 this Monday if he’d been an ordinary minister without the Gandhi-like calling to integrate racist America via the potent weapon of non-violence. "History has seized me," King explained in the early ’60s, as he became a peripatetic foot soldier in the battle to "break down the walls of segregation" and to bring his "Negro" people "to the promised land." PBS’s The American Experience has chosen to honor the 75th birthday with Citizen King, a 90-minute documentary produced by Orlando Bagwell (Malcolm X: Make It Plain) and Noland Walker (Africans in America:...