themselves? >> well, based on previous reports, i can only go under the assumption of what i heard. they are tether ed -- they tet r tethered each individual boy to the lead diver. the second diver, which is essentially a safety diver, is following behind. based on the previous stories that the boys had no swimming capability, it sounds as they are pulling the boys along with the addition of the heavy gauge rope installed in the system over the past several days. it is highly likely that the cave diver, rescue divers that are bringing these boys out, might even be pulling themselves along which can help accelerate the speed with which they traverse this area.