1) The document discusses national emergencies in India, including the constitutional provisions around declaring emergencies and the effects.
2) Three national emergencies have been declared in India - in 1962 due to the Sino-Indian war, in 1971 due to the Indo-Pak war, and in 1975 by Prime Minister Indira Gandhi.
3) The 1975 emergency is considered the "black spot on democracy" due to the huge misuse of power through preventive detention laws and suspension of civil liberties.