The US military has tested the biggest “bunker-buster” bomb in its arsenal, a 15-ton bomb designed to penetrate targets buried deep underground, a report says. The Wall Street Journal reported on Friday that the 30,000-pound (15 tons or 13,608 kilograms) device, known as the Massive Ordnance Penetrator (MOP), was tested in mid-January. A B-2 Spirit Stealth Bomber, which took off from Whiteman... 

US Defense Secretary Leon Panetta says American bunker-busters may not penetrate Iran's deepest bunkers if they are protected by Iranian-made “smart concrete." As tension escalates between the US and Iran, American officials are increasingly concerned that the use of “smart concrete” may render Iranian nuclear sites impervious to US bunker-buster bombs. An article published by Aggravate...