Target Acquisition Minefield Detection System (also known as the ""Airborne Standoff Minefield Detection System", abbreviated as ASTAMIDS) is a bomb-detection system engineered to detect improvised explosive devices (IED).
 It provides a Unit of Action (UA) asset that can be used in Tactical Operations in day or night, to detect and locate surface obstacles and recently buried minefields.
 ASTAMIDS is currently being tested in the Northrup Grumman MQ-8B Fire Scout unmanned aerial vehicle.
A Blast resistant mine is a landmine (intended for anti-tank or anti-personnel purposes) with a fuze which is designed to be insensitive to the shock wave from a nearby explosion.
 This feature makes it difficult or impossible to clear such mines using explosive minefield breaching techniques.
 As a result, the process of clearing minefields is slower and more complex.
 Blast resistance can be achieved in a number of ways.
The anti-personnel obstacle breaching system (APOBS) is an explosive line charge system that allows safe breaching through complex antipersonnel obstacles, particularly fields of land mines.
 The APOBS is a joint DOD program for the U.S. Army and the United States Marine Corps.
The Python Minefield Breaching System is used by the British Army to clear minefields.
 It replaces the Giant Viper, and has the ability to clear a safe lane in minefields 180–200m long and 7.3 m wide through which vehicles can pass.
IMX-101 is a high-performance insensitive high explosive composite mixture developed by BAE Systems and the United States Army to replace TNT in artillery shells, starting as soon as 2011.
 IMX stands for "Insensitive Munitions eXplosives", which refers to the purpose of IMX-101: to provide explosive force equivalent to TNT without its sensitivity to shocks such as gunfire, explosions from improvised explosive devices, fire, and shrapnel.
 For example, it is believed that a training incident in Nevada which killed seven Marines would not have occurred with the new explosive.
 On March 23, 2013, the United States Army ordered $780 million worth of the explosive, with a production of millions of pounds annually, to be produced by BAE at Holston Army Ammunition Plant in Tennessee.
 The new explosive will cost $8 per pound, compared to $6 per pound for TNT.
The rapid anti-personnel minefield breaching system or RAMBS II is a British rifle grenade used to breach obstacles and clear minefields.
 It is designed to replace the Bangalore torpedo, offering a more effective and flexible alternative.
 When deployed, the RAMBS II will clear a path 60 metres long and 0.6 metres wide, compared to the Bangalore's cleared area that is 15 metres long and 1 metre wide.
The Mark 16 torpedo was a redesign of the United States Navy standard Mark 14 torpedo to incorporate war-tested improvements for use in unmodified United States fleet submarines.
 The torpedo was considered the United States standard anti-shipping torpedo for twenty years; although significant numbers of Mark 14 wartime production remained in inventory.
 This hydrogen peroxide propelled, 21 inch (53 cm) torpedo was 246 inches (6.25 m) long and weighed 2 tons (1800 kg).
 The Mod 0 warhead contained 1260 lb (572 kg) of TPX explosive and was the most powerful conventional submarine torpedo warhead ever used by any Navy.
 The United States used TPX explosive which was about 75% more powerful (7405 J/g.)
 than the Type 97 explosive in the larger Japanese Type 93 Mod 3.
 (780 kg of Type 97, 4370 J/g.)
 The Mod 1 warhead contained 960 lb (435 kg) of TPX or HBX (7552 J/g.)
 explosive.
 The torpedo could be set for straight- or pattern-running.
A Bangalore torpedo is an explosive charge placed within one or several connected tubes.
 It is used by combat engineers to clear obstacles that would otherwise require them to approach directly, possibly under fire.
 It is sometimes colloquially referred to as a "Bangalore mine", "banger" or simply "Bangalore".
The MAPED F1 is a claymore shaped plastic bodied directional anti-personnel mine which is designed to wound or kill by fragmentation.
 It has been the standard directional anti-personnel mine of the French army since the late 70s.
 The mine body is flat on the back and convex on the front, it has a small aiming sight on the top left corner and plastic lugs in the bottom corners for attaching a pair of "A" frame support legs.
 The mine contains a plastic explosive charge to propel 500 steel ball fragments to a range of 50 meters in a 60' arc.
 It is battery powered and is normally actuated by breakwire, but tripwire and command actuation is also possible.
 The mine is surface mounted and it can be located visually or with metal detectors under most field conditions.
 The MAPED F1 can be defeated by blast overpressure from explosive breaching systems like the Giant Viper and MICLIC unless it is set up for command actuation.
Pyroshock, also known as pyrotechnic shock, is the dynamic structural shock that occurs when an explosion or impact occurs on a structure.
 Davie and Bateman describe it as: "Pyroshock is the response of a structure to high frequency (thousands of hertz), high-magnitude stress waves that propagate throughout the structure as a result of an explosive event such as an explosive charge to separate two stages of a multistage rocket."
 It is of particular relevance to the defense and aerospace industries in that they utilize many vehicles and/or components that use explosive devices to accomplish mission tasks.
 Examples include rocket stage separation, missile payload deployment, pilot ejection, automobile airbag inflators, etc.
 Of significance is the survival and integrity of the equipment after the explosive device has activated so that the vehicle can accomplish its task.
 There are examples of flight vehicles Boeing-The Aerospace Corp which have crashed after a routine explosive device deployment, the cause of the crash being determined as be a result of a computer failure due to the explosive device.
 The resultant energies are often high "g"-force and high frequency which can cause problems for electronic components which have small items with resonant frequencies near those induced by the pyroshock.

Question:  The rapid anti-personnel minefield breaching system and Bangalore torpedo are both examples of explosive devices used to do what?
Answer: clear obstacles