MUMBAI (Reuters) - Amitabh Bachchan will undergo surgery this weekend, the actor revealed on his blog on Thursday. The 69-year-old Bollywood actor didn't specify what the surgery was for, but referred to his stomach being a "battle-ground" which would have to "entertain this as well". "It's a war zone, my body, and one which has been through a great deal and still does. I sometimes lament the fact that I do not have the benefit of a complete and ailment free body structure," he wrote. Bachchan, who underwent abdominal surgery six years ago, said there would be a CT scan before surgery. ...