One photo shows where the gunman perched his weapons as he sniped innocent concertgoers.
"Stop giving fame-seeking mass shooters the personal attention they want," they say.
Police have arrested a man suspected of nine random killings and more shootings after a year-long chase.
The motive was unclear in the Cincinnati shooting that took place at around 1 a.m. local time.
A report also said the Reina nightclub was not the gunman's prime target.
Authorities say Esteban Santiago, 26, had a history of erratic behavior before the mass shooting that killed five and wounded eight.
The U.S. outranked China, Japan, Germany and the U.K.—combined—in firearm assaults.
See if you can catch the message the first time you watch the nonprofit's new video.
The shooter, believed to be armed with a rifle, was last seen leaving the Burlington, Washington, mall and walking toward a nearby highway.
The 18-year-old gunman owned a book on American school shooters.
Three officers are dead and three wounded, with one in critical condition, as investigation continues.
Five officers were killed by sniper fire during a peaceful protest in downtown Dallas.
President Obama reacted on Friday to the murder of five policemen.
Republican Joe Walsh appeared to forewarn the president.
Police stormed the Kinopolis cinema complex in the town of Viernheim.
A squad of officers entered the club and shot dead the gunman, identified as Omar S. Mateen.
Israel revokes 83,000 permits for Palestinians in the West Bank and Gaza in response to shooting.
Ray Fryberg Jr. sentenced for illegally possessing guns, one of which his son Jaylen used to kill four classmates.