Lab Report: How Phoenix Prevented Chaos in Trump's Visit

Rally night: Despite some tear gas and bottle-throwing in Phoenix yesterday, along with some controversial statements from President Donald Trump, the campaign rally that seemed ripe for combustion ultimately didn’t stoke the type of partisan or racial violence that some feared. Politico reports:

Anti-terrorism tactics: After the terrorism in Barcelona, European cities continue to experiment with physical barriers to prevent vehicular attacks in public spaces. Miami, meanwhile, responds to the threat by installing bollards along its internationally known South Beach promenade. (New York Times, Miami Herald)