Americans at July 4th celebrations warned of lone wolf terrorist threat

Local and federal authorities across the country are likely preparing for potential threats during Fourth of July celebrations next weekend amid tensions between the United States and the Middle East, according to a former U.S. Secret Service agent.

Tensions escalated on June 22, when the U.S. Military bombed three key nuclear sites in Iran, according to Trump administration officials.

"Due to the Iran conflict, the Department of Homeland Security has a National Threat Advisory System...