The 'Chintan Shivir' of senior officers of the Central Armed Police Forces and National Security Guard commenced on Monday in New Delhi, said an official. Union home minister Amit Shah chaired the 'Chintan Shivir' of Indian Police Service (IPS) officers posted in the CAPF and NSG in the national capital. The home minister will also chair a meeting with ministers of Disaster Management of the states and Union Territories on Tuesday.