The E61 was perceived as superior to its predecessors , the M33 cluster bomb and its payload of M114 bombs .
The E61 held about 35 milliliters ( 1.2 U.S. fl oz ) of agent and a variety of pathogens could be used , generally anthrax spores .
The E61 was perceived as superior to E61 's predecessors , the M33 cluster bomb and its payload of M114 bombs .
The E61 held about 35 milliliters ( 1.2 U.S. fl oz ) of agent and a variety of pathogens could be used , generally anthrax spores .