let s talk about the threat streams. so very, very real threat streams, very, very what we would call tactical. that means imminent, could occur at any moment. they range from rocket attacks. we know they would like to lob a rocket in there if they could. we have pretty good protection against that. we have our anti-rocket and mortar systems, the gun systems that are pretty effective against these kinds of attacks. we have them well positioned around the boundary of the airfield. we also know they d like to get a vehicle attack if they can, from a small vehicle to a large vehicle. we ve already seen a vest wearing suicide attacker. all of those things we look at. now, the other thing we do is, we share versions of this information with the taliban so they can actually do some searching out there for us.