Hours after residents of Baltimore, Maryland, set the city aflame, President Barack Obama took to the Rose Garden to explain in professorial style just why America, under his administration, keeps watching young black men loot buildings and attack police officers. "We have seen too many instances of what appears to be police officers interacting with individuals -- primarily African-American, often poor -- in ways that have raised troubling questions. And it comes up, it seems like, once a week now, or once every couple weeks," Obama said, proclaiming that police brutality against blacks amounted to a "slow-rolling crisis." He added,...