Rujira Banerjee, the wife of TMC leader Abhishek Banerjee, is accused of involvement in a coal scam. The CBI issued a notice to Rujira in this case on Sunday. Reacting to this, Bengal Chief Minister Mamata Banerjee said that 'it is not easy to break ours backbone. Neither shall we fear, nor we bow down. ' During this, she also alleged the BJP of misusing the CBI. Watch video.