Lob bomb

A lob bomb (known officially as an improvised rocket-assisted mortar, improvised rocket-assisted munition, or IRAM) is a rocket-fired improvised explosive device made from a large metal canister (usually a propane gas tank that has been drained of its contents and filled with explosives, scrap metal, and ball bearings), which has been used by insurgents during the Iraq War since late 2007. The weapon is essentially an airborne version of an improvised explosive device.
Design
Lob bombs are propelled by 107 mm rockets and launched, several at a time, from the backs of small trucks where they are arranged in rows, sometimes by remote control (using a signal from either a cell phone, cordless phone, command wire, or other form of remote control device). They are typically launched in an arced trajectory, which enables them to be aimed over walls that enclose U.S. bases and other military facilities, in a similar manner to a conventional...