what rocket manufacturer produced athena and also collaborated with the rockwell international corporation on making a rocket with mass over 2.304e+06?
(AND spaceflight.rocket_manufacturer (AND (JOIN (R spaceflight.rocket.manufacturer) m.0fft5p) (JOIN spaceflight.rocket_manufacturer.rockets_manufactured (AND (JOIN spaceflight.rocket.manufacturer m.025sdg2) (ge spaceflight.rocket.mass 2.304e+06^^http://www.w3.org/2001/XMLSchema#float)))))