The Pentagon has been upgrading the biggest bunker-buster bomb in its arsenal even as talks continue over Tehran's nuclear program, readying a weapon that could destroy Iran's facilities if negotiations fail, the Wall Street Journal on Friday. Work to improve the design, guidance systems and anti-jamming capabilities on the so-called Massive Ordnance Penetrator began before the latest round of negotiations with Iran started. The most recent test of the 30,000-pound device was in mid-January, the Journal said. The bomb was created to give US president Barack Obama options for attacking fortified facilities like Iran's Fordow nuclear installation, which is built into a mountain.
