Bollywood superstar Salman Khan on Tuesday officially stepped up for PM Narendra Modi's 'Swachh Bharat' initiative. The actor initiated a cleanliness drive in Karjat (Mumbai) and posted the photos on Facebook. Salman, besides nominating all his Facebook and Twitter followers, also nominated Amir Khan, Rajnikanth, Omar Abdullah, Azim Premji, Pradeep Dhoot, Rajat sharma and others.