Is Dr. Martin Luther King Jr. III is right vis-a-vis Gandhi?

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Dr. Martin Luther King III was recently in India to commemorate the fifty years of his great dad's visit to this country. In India, Dr. King said that the philosophy of Gandhi can be used to wipe out the terrorism from the planet. Is it possible to use the Gandhian Philosophy, a philosophy which is based on non-violence and Satyagraha against the cruelty of terrorism? Gandhi was successful in defeating the mighty British without ever using the weapon and ever professing the use of weapons. However, that age was different. Even in this age, is Gandhian philosophy relevant?