Trinamool chief Mamata Banerjee's mega rally for a grand alliance of opposition parties kicked off this noon. More than 20 national leaders, including three present chief ministers Arvind Kejriwal, Chandrababu Naidu and HD Kumaraswamy; and former chief ministers Farooq Abdullah, Omar Abdullah, Akhilesh Yadav and Gegong Apang are attending the rally. The event -- called the "United India Rally" -- aims at uniting various political parties against the Narendra Modi-led BJP in the upcoming Lok Sabha elections.