U.S. drops 'mother of all bombs' on Afghanistan, largest non-nuclear bomb in arsenal

They held a well fortified position, from which they were able to launch repeated attacks on coalition forces and the local population. Then they could retreat back into the complex, where they could not easily be attacked, and where they held large supplies of weapons.
From a Military standpoint, there were limited options:

  1. We could pull all coalition forces from that area, and leave it as an enemy strongpoint.
  2. We could continue conventional attacks against the people using those fortifications, which would have little effect, but come at great cost to us through attrition and lost lives.
  3. We could launch a sustained attack with dozens or hundreds of smaller BLU-133 based weapons, from multiple aircraft over the course of many missions.
  4. MOAB