Prime Minister Narendra Modi on Saturday paid tribute to the ‘Iron man of India’ Sardar Vallabhbhai Patel on his birth anniversary, marked by the ‘Rashtriya Ekta Diwas’. While recounting Patel's contributions and how he played a central role in the unification of India, PM Modi said Sardar Patel was a great thinker who always made efforts for the welfare of the farmers and laborers. Watch the video for more details.