India and Pakistan on Monday began their biggest prisoner exchange since the launch of peace talks last year, bringing hundreds of fishermen, farmers and others imprisoned for illegal entry and other crimes to their main border crossing to let them return home. The hand-over began with 64 Indian prisoners who crossed into India via the Wagah crossing, said Kamal Shah, secretary of Pakistan's Interior Ministry. Some 435 Indian prisoners and 152 Pakistanis were due to be exchanged on Monday, The Associated Press reported.