I remember my Catholic-school class praying for President John Kennedy the day he was shot in 1963. The next year, there were riots in Bedford-Stuyvesant, Brooklyn, just 35-minutes (17 miles) from my home bordering that borough. More riots in Harlem followed. Major uprisings trailed in cities like Watts (Los Angeles) in 1965. Then, in the long, hot summer of 1967, Detroit, Newark…