area equivalent to nine city blocks. >> this is the right weapon against the right target. >> a spokesperson tells cnn each bomb cost about $170,000. because it is built in-house and created from parts of existing sift t systems. >> it is constrained. no civilian collateral damage. it will collapse tunnels. explode ieds. >> but beyond its physical impact, military analysts say there is payoff in flaunting such a huge weapon which could rattle isis on the ground. >> it will have a huge psychological effect on this area that has a lot of transitioning between pakistan and afghanistan isis fighters. >> afghan ambassador to the u.s. says to expect an increase of military action in afghanistan. >> do you need the u.s. to do more to make that happen? should they expect more u.s. action like this? >> well, in operations like this, we do use -- we do do joint operations with the united