Heat ray ‘was sought’ against protest in Washington’s Lafayette Square

Officers requested a "heat ray" weapon for possible use against protesters in a park next to the White House in June, a National Guard major has testified.

Military police allegedly asked for the Active Denial System (ADS), which makes targets feel their skin is on fire.

It was before authorities cleared Lafayette Square of demonstrators on 1 June amid protests over the killing of black man George Floyd.

The National Guard did not possess the heat ray and it was not used.

Law enforcement officers are instead believed to have used tear gas, rubber bullets and smoke grenades to clear the park.

At the time authorities said it was to tackle violent protesters who had thrown rocks at police and started fires. Reporters at the scene however said the demonstration had been peaceful.

Park Police have denied using tear gas, saying that they instead fired "pepper balls" – projectiles with capsaicin, the chemical that gives peppers heat – at protesters.

Shortly after officers cleared the park, US President Donald Trump walked across the street from the White House for a photo opportunity outside a church.

The clearance of the protesters to make way for Mr Trump drew heavy criticism from both Democrats and Republicans, and Washington DC Mayor Muriel Bowser called it "shameful".

What did the major say?

National Guard Major Adam DeMarco was at the scene of the protest, serving as a liaison officer in a supervisory role.

In written testimony provided to US lawmakers and first published by NPR, Maj De Marco said a senior military police officer asked if the National Guard in the US capital had the ADS in the morning of 1 June.

The heat ray weapon uses a microwave beam to make human skin feel like it is burning. Authorities say it causes no permanent damage.

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In an email which Maj DeMarco was copied into, the senior officer said the ADS "can immediately compel an individual to cease threatening behavior", describing the effect of the weapon as "overwhelming".

Maj DeMarco responded that the DC National Guard did not have the ADS, nor an LRAD – a Long Range Acoustic Device, also requested, which can blast a wall of sound at crowds.

Federal officials also began stockpiling ammunition that day, Maj DeMarco said.

A US defence department official, speaking to the Washington Post, characterised the emails as "routine inventory checks" about available equipment.

The department, the army and the National Guard did not respond to specific questions from the newspaper about munitions and their planned use.

The major is an Iraq War veteran who has said he was "deeply disturbed" by the official response. The 34-year-old ran for Congress in 2018 as a Democrat on a platform that was heavily critical of President Trump.

According to a New York Times report in August, borders officials proposed using the heat ray to stop migrants at the US southern border in 2018. The system was deployed in Afghanistan by the US military but reportedly was not used operationally.

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