Last night on GEO TV in Capital Talk, Dr Samar Mubarik Mand first time expose the detail of Pakistan nuclear program.He mention Pakistan did six experiment five on 28th and most crucial one and device was specifically for armed forces was tested in the desert on May 30th. Pakistan did first cold test successfully in 1983. But its was not allowed to expose at all, strict lip and intelligence security. More is coming ... About the security of nuclear device, his answer was,when we make any device it has embadded code during manufacturing process. His words , even i leave the device on the raod, you spend ages to explode the device, but you can't.These devices have extreme security.