The hot and muscular stud John Abraham is back supporting things that are related to good cause. This time around he has joined hands with Smita Thackeray for a campaign on eradicating AIDS. The 'I Pledge' campaign of Smita Thackeray-helmed Mukti Foundation took off with actor John Abraham as the face of the campaign. John when he came to know about the campaign had immediately wanted to be a part of it.