Washington, June 02: In order to guard against chemical and biological attacks on Washington, US security experts have installed sensors to map wind currents in different parts of the city. About six aluminum weather towers, each 30 feet tall, have been installed atop government buildings in downtown Washington, Arlington and Silver Spring in the Greater Washington area, officials were quoted as saying in the media.

The sensors are being positioned near sensitive sites, including Capitol Hill, the White House, the Pentagon, the Mall, the National Zoo and the National Arbotratum, and on cellular relay towers within the capital beltway, they said adding more such towers are planned.

Bureau Report