We are living in precarious times at present and India, especially, is facing multiple and formidable security challenges. The internal and external threats, such as Hinterland Terrorism, Militancy in Jammu and Kashmir, Insurgency in the North-East, Left-Wing Extremism and Riots and Mob Violence are detailed and dealt-with in this book. This book, now in its second edition is a one-stop guide for the students of UPSC Mains GS 3 Syllabus. This book is a detailed compendium of Internal Security and Disaster Management. The edition includes detailed account of Operations Sindoor - India's retaliation to Pahalgam attack. The book features recent geophysical and meteorological hazards like floods, cyclones and earthquakes.