UPDATE 4-Explosions fire reduce Mississippi biodiesel plant to rubble

(Adds comments from plant manager, state emergency agency, name of plant) By Sabina Zawadzki and Robert Gibbons NEW YORK Jan 22 (Reuters) - Explosions and an intense blaze at a biodiesel complex in northern Mississippi reduced it to smoldering rubble on Wednesday, but the two workers at the plant managed to escape unharmed, the plant's manager said. The first explosion rocked the JNS ...