A top-secret Iranian military installation was struck by a triple blast Tues. Oct. 12 the day before Iranian president Mahmoud Ahmadinejad landed in Lebanon. DEBKAfile's sources report the site held most of the Shehab-3 medium-range missile launchers stocked for striking US forces in Iraq and Israel - some set to deliver triple warheads (tri-conic nosecones). The underground bunkers housing the launchers at the Revolutionary Guards Imam Ali mountain base in Lorestan were built to defy sabotage.