A security fence rings a Las Vegas building where a Nevada county tabulates votes. An Arizona sheriff has his department on high alert to guard against potential violence with drones and snipers on standby. The National Guard has been or will be activated in 19 states so far to help maintain peace.
As a tense America votes on Tuesday for either Republican Donald Trump or Democratic Vice President Kamala Harris for president, concerns about potential political violence have prompted officials to take a variety of measures to bolster security during and after Election Day.
