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A flag covers the casket of Las Vegas Metropolitan Police Officer Alyn Beck during his memorial service at The Smith Center for the Performing Arts Saturday, June 14, 2014 in Las Vegas. Two suspects shot and killed Beck, 41, and fellow police officer Igor Soldo, 31, in an ambush at a Las Vegas restaurant Sunday, June 8, 2014, before fatally shooting a third person inside a nearby Wal-Mart, authorities said. (AP Photo/John Locher, Pool)

Online rants, anti-government extremists fuel fears for U.S. cops

Yahoo News

Las Vegas police officers Alyn Beck and Igor Soldo were ambushed and executed on June 8 while eating lunch. On social media, their killers discussed shooting officers and frequented anti-government extremists pages.

See RELATED STORY by Jason Sickles/Yahoo News

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