. . "This frame concerns internally undifferentiated Substances. As their gut bacteria ferment cellulose , they generate methane gas , which escapes from the rear ends of the insects. The pipes are leaking noxious gas. Some CH-47 \"Bombers\" were equipped to roll-out riot control gas or napalm onto Viet Cong bunker complexes from the rear cargo ramp."@en . . . . . . "2005-02-27T20:56:26+01:00"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Substance" . . "1321"^^ .