Israel says one of its main goals is to destroy Iran’s nuclear capabilities - including the Fordow nuclear site, which is buried inside a mountain. There's one weapon that could achieve this - and only the US is known to have it. As BBC's security correspondent Frank Gardner wrote earlier, this is the 30,000lb question. Because that, (13,600kg), is the tonnage of the weapon that would be needed to reach some of Iran’s most secretive and valuable nuclear apparatus, buried 90m (295ft) deep under a mountain. The weapon, to give it its full name, is the GBU-57 MOP, standing for...