We reported on the tragic explosion that happened in the Chinese Foxconn factory where the Apple iPad 2 is made on Friday. The explosion apparently was the result of combustible aluminum dust that was in ducts in the polishing section of the plant according to initial investigations. Two workers were killed in the initial explosion and there are still several other workers in the hospital. M.I.C. Gadget reports that the combustible dust had apparently gathered in a dust collecting pipe.