The United States dropped the “world’s largest non-nuclear bomb” in eastern Afghanistan on Thursday, against a series of mountainous caves used by ISIS militants as shown in this video. Also known as (MOAB),  “mother of all bombs,” the GBU-43 is a 21,600 pound GPS-guided munition that has a 1 mile blast radius. The giant bomb was dropped from an MC-130 aircraft in the Achin district of Nangarhar province.

While the MOAB easily destroyed important ISIS strongholds on the Pakistan border, it was certainly overkill and meant to send a deeper message to the world and specifically to North Korea. The MOAB was designed to destroy underground nuclear facilities and was first tested in March 2003, but has never been used in combat until now. The bomb was dropped as the USS Carl Vinson Naval carrier attack group positions itself on the Korean peninsula, just as North Korea’s biggest national holiday kicks off.

Saturday marks the 105th birth anniversary of Kim Il Sung, the country’s late founder and grandfather of Kim Jong Un. Known as the “Day of the Sun”, the celebration normally includes a huge military parade and synchronized public performances involving tens of thousands of people. Pyongyang residents have been seen practicing for weeks and the entire country will take part in the festivities.

While “Day of the Sun” celebrations always focus on military prowess, North Korea’s recent nuclear missile tests have set the world on edge. Kim Jong Un is known for threatening his neighbors and the US, but the recent missile launches toward Japan have forced world powers to find a way to curtail North Korea’s nuclear aspirations.

As 150,000 Chinese troops converge on North Korea’s border and the US Navy moves in by sea, Kim Jong Un is backed into a corner and the dropping of America’s first MOAB, is a message for the crazy dictator directly from President Trump. Not only does America have the capability to take out North Korea’s nuclear facilities, but the president is not afraid to use MOAB – even against low level ISIS underground moles.