The BJP today is observing a black day across the nation to mark the anniversary of emergency imposed in 1975 by the then PM Indira Gandhi. Prime Minister Modi launched a scathing attack on the congress and said that the emergency was imposed for one family's hunger for power. Other BJP top leaders will also hold press conferences across the country to highlight how it was the darkest period of independent India. Meanwhile Vice President Venkaiah Naidu has said that the emergency must be taught as a part of school curriculum to sensitise youth towards the darkest phase of Indian history.