Inside the Tata power struggle: Who controls the group, and who calls the shots?

Mumbai: India's Tata Group, which owns Jaguar Land Rover and Air India, is facing its worst crisis in years, pitting the board of its holding company against its controlling charity arm and raising questions about the future of the 158-year-old conglomerate.

Here is an explainer on the complex dispute that has embroiled the salt-to-aviation group, which has annual revenues of over $180 billion.