SAJJAD HUSSAIN/AFP/Getty Images
Indian pedestrians walk on a street under electric wires in the old quarters New Delhi on July 31,2012. A massive power failure hit India for the second day running as three regional power grids collapsed, blacking out more than half the country in a crisis affecting over 600 million people.
For two days, more than 600-million people in India were without power due to the electric power system collapsing.
But even though power has been restored in many parts of the country, questions about the electrical grid remain. Many wonder if it's only a matter of time until the electrical system in India again fails massively.
Tinku Ray, reporter based in Delhi, India.