A broad-band digital satellite communications system for providing broad-band data services. The barrier layer is heated such that the barrier layer becomes tacky. A plurality of first, second, third and fourth associated edge locations of the body and are capable of being pivoted between a first locking position and a second unlocking position in which the legs may be pivoted to a folded position against the body. Another part of the invention is based on the surprising discovery that fusions between ESAT-6 and MPT59 are superior immunogens compared to each of the unfused proteins, respectively.