The proposed surgery of the knee joint of Prime Minsiter Atal Bihari Vajpayee is a routine operation, All India Institute of Medical Sciences (AIIMS) director P K Dave said on Friday. It can be done in the Institute if the Prime Minister so desires, said Dave, an orthopaedic specialist, who was treating the PM for his knee problem, osteoarthritis. The director, however, said the Institute was not given any indication by PM's office so far about the surgery being done at AIIMS. Bureau Report