People across the country joined protests and held vigils late this week, following two highly publicized police shootings in Louisiana and Minnesota. As those incidents dominated headlines and social media, a sniper targeted law enforcement at a peaceful protest in Dallas, killing five police officers and shocking the nation.On Saturday, President Obama rejected the notion that these latest tragedies portended the country's return to an era of racial brutality."You're not seeing riots and you're not seeing police going after people who are protesting peacefully," he said from Warsaw, Poland, where he was attending a NATO summit. "You've seen almost uniformly peaceful protests and you've seen, uniformly, police handling those protests with professionalism."Here are scenes of protest, prayer and activism from around the country.DallasSince Thursday's shooting left five police officers dead, several blocks of downtown Dallas have been blockaded, with public access to a large part of the
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