Local and federal authorities are ramping up security precautions heading into the July 4 holiday weekend amid heightened concerns about potential terror attacks, NBC News is reporting. While officials say there are no specific or credible threats, the rise of ISIS and ISIS-inspired lone wolf attacks is prompting calls for increased vigilance. Police in New York City, where the Macy's fireworks show over the East River is expected to draw big crowds, have pledged "enhanced counterterrorism and security measures." Authorities in Boston, Los Angeles, San Diego, San Francisco and Washington, D.C., have also upped security for the weekend. Officials urge members of the public to be on the lookout for suspicious activity. "Officers can't be everywhere at once," San Francisco Police Department spokesman Albie Esparza said. "We depend on our public to be our eyes and ears to report any suspicious activity."
