Beyonce honors police killed in Dallas: 'No violence will create peace'
Obama breaks silence on the fatal shootings of Alton Sterling and Philando Castile
Memphis officer Verdell Smith struck, killed by triple-shooting suspect
Toddlers have shot at least 23 people so far in 2016
The murder rate in Chicago is up 84 percent this year
The most dangerous places in the US
Uber driver suspected in Michigan shootings, 6 dead
There were already 27 mass shootings in 2016
Shooting at boxing weigh-in in Dublin leaves 1 dead, 2 injured
Exclusive: California shooters likely planned multiple attacks - official
2 Palestinians killed as Israel raids West Bank
Virginia Tech: How much is a massacre worth?