On 1 March 2020, the 29 Special Composite Group complex was inaugurated by the then Home Minister Amit Shah at Rajarhat, West Bengal. The ranks in NSG are roughly on the pattern of the police and the CAPF, as follows:  The NSG was established in the wake of 1984 Operation Blue Star, and the high collateral damage to Golden Temple, and civilian and military collateral casualties. Since its founding the NSG has been used in the Punjab in 1986, and Jammu and Kashmir. Some of the NSG's known operations include:  Selection is demanding and has a drop out rate of about 70–80 per cent. Three of their 14 months of training in Manesar, Haryana, are devoted to the basics. Physical fitness training has 26 elements, ranging from a cross-country obstacle course to jumping from heights and across divides and scaling different kinds of terrain. One endurance test involves martial arts, target shooting at the end of an obstacle-ridden cross-country run. This is meant to gauge the candidate's performance under conditions of stress and exhaustion. Those who successfully complete the tests are sent for nine months of advanced training. Before being inducted into the NSG, aspirants also have to undergo a rigorous psychological test. The training includes learning to conduct urban counter-terrorism, underwater operations, house intervention, counter-UAV and anti-drone operations, bomb detection and disposal skills, apart from various other specialisations. The National Security Guard has conducted international exchanges and joint training with foreign special forces, including those from Germany, Russia, United States, France, Israel and Australia. Joint cooperation between the United States and NSG was first discussed in 2013. Further discussion took place when US president Barack Obama visited in January 2015. Subsequently, the first joint counter-terrorism exercise between NSG and United States Army Special Forces, code named "Balanced Iroquois", started on 18 October 2015. This three-week long exercise was preceded by a joint airborne-jump at Aero India 2015. In February 2018, Green Berets from the 1st Special Forces Command (Airborne) conducted a joint training exercise with the NSG in Kolkata. The Green Berets learnt some urban warfare strategies from the NSG while the NSG learnt about some advanced equipment of the US soldiers. The drill included intervention techniques, training in the KolkataMetro system and a drill at the Indian Institute of Technology Kharagpur. On March 2019, the NSG and US special forces from the 1st Special Forces Group carried joint exercises in Hyderabad.