A video grab from 2003 file footage showing a GBU-43/B Massive Ordnance Air Blast detonating during a test at Eglin Air Force Base.
"As ISIS-K's losses have mounted, they are using [improvised bombs], bunkers and tunnels to thicken their defense", said Army Gen. John W. Nicholson, commander of U.S. Forces Afghanistan.
"At around 7:00 p.m. local time in Afghanistan last night, the United States military used a GBU-43 weapon in Afghanistan".
In the United States of America military the bomb is called "mother of all bombs", noted the agencies.
No, this is the first combat use of the MOAB since it was developed in the early 2000s.
Another theory comes from those who believe the surprise bombing was meant to send a political message about the U.S. government's willingness and ability to use extreme force as it attempts to intimidate North Korea, Russia and Syria. The damage of the bombing is not clear yet. "And with the maximum amount of caution so that we don't cause civilian casualties".
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US officials say intelligence suggests Islamic State is based overwhelmingly in Nangarhar and neighboring Kunar province.
This is the first time a MOAB has been used in the battlefield, according to the United States officials.
An Afghan commando stands guard at Pandola village, near the site of the US forces' bombing in Achin district of Jalalabad, east of Kabul, Afghanistan, Friday, April 14, 2017.
The Afghan defence ministry said the bomb struck a village area in the Momand valley where IS fighters were using a network of caves. "Bombing was carried out in coordination with Afghanistan", the Afghan government said.
Nine metres long, with a diametre of one metre, according to GlobalSecurity.org, it is the largest-ever satellite-guided, air-delivered weapon in history. The US said partnered forces had wrongly identified the location as an IS base, when it was in fact a strategic position for the Syrian Democratic Forces. It was dropped from a MC-130 aircraft - the US Special Forces variant of the Hercules transport. The official name for the bomb is a GBU-43B.
While the war in Afghanistan has largely slipped from public consciousness in the US, replaced by the conflict in Syria and ongoing tensions over North Korea, there are still around 8,400 USA troops in the country engaged in counter-terrorism operations. It has attracted disaffected members of the Pakistani and Afghan Taliban as well as Uzbek Islamists.
Achin is close to the Pakistani border, which has always been used by militants to smuggle weapons and fighters between the two countries.