Light trick foils fake nuclear warheads

摘要

There's a new way to identify fake nuclear warheads, without revealing what's inside. The technique offers a way out of a tricky catch-22: to comply with nuclear arms reduction treaties, inspectors need to scrutinise warheads to verify that real missiles, not decoys, are being disarmed. The US and Russia alone have thousands of nukes slated for dismantlement between them. But to protect state secrets, governments won't allow tests that reveal a bomb's blueprint.