WASHINGTON — U.S. authorities are deploying radiation-detection aircraft and other specialized security assets as part of an expanded security operation for Independence Day celebrations, particularly in the nation's capital, while officials say they have identified no credible threats to the events.
Federal and local agencies have elevated security for major July 4 gatherings as the United States marks the 250th anniversary of its independence. In Washington, celebrations on and around the National Mall have been designated a National Special Security Event, placing them under the highest level of federal security coordination.
The U.S. Department of Energy's National Nuclear Security Administration (NNSA) said its Aerial Measuring System aircraft will conduct surveillance missions to detect any potential radiological hazards. The aircraft are equipped with specialized sensors capable of measuring radiation levels from the air and are supported by ground teams carrying portable radiation detectors. The agency said such operations are part of longstanding preventive security measures used during major national events.
"We are flying missions to make sure that there are no radiological threats," NNSA Administrator Brandon Williams told ABC News. He added that personnel equipped with radiation-detection equipment would also maintain a continuous presence across the National Mall.
The radiation-monitoring flights form part of a broader federal security effort that includes thousands of law enforcement officers, extensive fencing, road closures and restricted access points. Visitors entering secured areas of the National Mall are required to pass through airport-style security screening, according to officials.
The Federal Bureau of Investigation also said it is employing technology designed to counter unauthorized drones during Independence Day events and the ongoing FIFA World Cup. FBI Co-Deputy Director Christopher Raia described the operation as an "all hands on deck" effort, while emphasizing that authorities were not tracking any credible threats to the holiday celebrations.
According to the Department of Energy, the Aerial Measuring System is part of the NNSA's Nuclear Emergency Support Team and has been used for decades to support major public events, emergency preparedness operations and responses to radiological incidents. The aircraft routinely establish baseline radiation measurements before high-profile events so officials can rapidly identify any abnormal readings if necessary.
Officials said security operations will continue throughout the July 4 celebrations, with federal, state and local agencies maintaining enhanced monitoring while urging the public to report suspicious activity through normal law enforcement channels.
