James S. Brady, the often-irreverent press secretary to President Ronald Reagan who was shot in the head during an assassination attempt on his boss in 1981 and who became an enduring symbol of the fight against unfettered access to guns in American society, died Monday at a retirement community in Alexandria, Va. He was 73. ... “Criminals who use guns typically do not buy them from a gun store or a gun dealer. They get them on the black market,” Cook, one of the foremost authorities on gun control, said in a speech at the University of Virginia law school at the time the study was...