The Bureau of Civil Aviation Security (BCAS) recently issued a circular saying that all “hyper-sensitive” airports in India will have to install a Perimeter Intrusion Detection System (PIDS) by the month of December next year. The PIDS is a sensor that helps in alerting security agencies of any intrusion through the airport’s boundary walls, according to a PTI report. Moreover, Greenfield airports in the country that are not part of the central government’s Regional Connectivity Scheme (RCS) will install the Perimeter Intrusion Detection System as well. The airports coming up under the Regional Connectivity Scheme will plan the installation of PIDS at the development stage itself, the BCAS circular issued on Monday stated.