India has a long tradition of ministers resigning on moral grounds, from Lal Bahadur Shastri quitting as Railway Minister after the 1956 Ariyalur train disaster to Finance Minister Krishnamachari after the Mundhra scam. Defence Minister VK Krishna Menon resigned after the 1962 Sino-India war setbacks, followed by Railway Ministers Nitish Kumar's and Mamata Banerjee's resignations after accidents.