as intersections and junctions. This gives the operator time to judge the moment to fire, when the vehicle is moving more slowly. Detonation is controlled by cable, radio control, TV or IR remote controls, or remote arming with a passive infrared sensor, or via a pair of ordinary cell phones. EFPs can be deployed singly, in pairs, or in arrays, depending on the tactical situation. Non-circular explosively formed penetrators Non-circular explosively formed penetrators can be formed based on modifications to the liner construction. For instance, U.S. patents 6606951 and 4649828 are non-circular in design. US6606951B1 is designed to launch multiple asymmetric explosively forged penetrators horizontally in 360 degrees. US4649828A is designed to form several clothespin shaped EFPs, increasing hit probability. In addition, a simplified EFP (SIM-EFP) can be made using a rectangular liner, similar to a linear shaped charge or modified platter charge. This design can be further modified to be similar to US4649828A with multiple cut and bent steel bars lined side by side instead of a singular liner. In Northern Ireland similar devices have been discovered that were developed by dissident Republican groups for intended use against the police. In Northern Ireland, the weapon was first used in March 2014 when a PSNI Land Rover was targeted as it travelled along the Falls Road in west Belfast. A police car was destroyed by an EPF detonated by a command wire in Strabane, Co Tyrone on 18 November 2022. Asteroid impactor The spacecraft Hayabusa2 carried a small carry-on impactor. It was dropped off Hayabusa2 on to an asteroid and detonated. The explosion created a copper explosively formed penetrator, which hit the asteroid with a velocity of 2 km/s. The crater created by the impact was a target for further observations by the onboard instruments. The shaped charge consisted of 4.5 kg of plasticized HMX and a 2.5 kg copper liner. See also High-explosive anti-tank M21 mine (landmine which uses an EFP) MAHEM Misznay–Schardin effect Munroe effect TMRP-6 (landmine which uses an EFP) References Further reading Fundamentals of Shaped Charges, W.P. Walters, J.A. Zukas, John Wiley & Sons Inc., June 1989, Tactical Missile Warheads, Joseph Carleone (ed.), Progress in Astronautics and Aeronautics Series (V-155), Published by AIAA, 1993, The Good Soldiers, David Finkel, Picador, 2009, External links Photo of a Canadian "Mach 6 aerodynamic EFP" Video of EFP trying to take out a Humvee Ammunition Bombs Explosives Improvised explosive devices