Big B gives a thumbs up to Aamir, Katrina, Abhishek's 'Dhoom 3' trailer

It's still a few hours for the official release of Aamir, Katrina and Abhishek's 'Dhoom 3' trailer and the social networking sites are already abuzz with the news. And it hasn't even left Bollywood megastar Amitabh Bachchan u movienews