PTI, NEW DELHI: An armed squad of over 60 CISF personnel has taken over security duty at the sensitive Indian Institute of Remote Sensing (IIRS) in Uttarakhand's capital Dehradun, to protect it against any possible terror strike or threat. The centre functions under the command of the Indian Space Research Organisation (ISRO) and is the premier training and educational facility for developing trained professionals in the field of remote sensing, geo-informatics and GPS technology for natural resources, environmental and disaster management.