Aadhaar: The challenges being faced by Nandan Nilekani

At 57, Nandan Nilekani has a lot to his credit: a bluechip career, a billion-dollarplus net worth, a star-adviser tag... But no assignment has been bigger than the one he is currently handling, rolling out Aadhaar. The final assessment on him will be hugely influenced by the success, or failure, of this crucial scheme. ET list the challenges: