I am just a pilot, not a politician nor a diplomat, so I'll leave out the discussion whether the EP3 was in "international Airspace" or not. I truly believe it was an accident. Could it have caused by the Chinese pilot or by the American pilots, we don't know for sure. As yet, there is no proof from the FDRs or other means to confirm or dispute the claim from either side. Regardless as to whose fault it was, no sane pilot will intentionally ram his/her plane against another plane, and size does not matter in anycase.