ATHENS, March 1 (Xinhua) -- Greece's Infrastructure and Transport Minister Kostas Karamanlis resigned on Wednesday following a fatal head-on collision of two trains that occurred in central Greece on Tuesday. At least 36 died in the crash. "It is what I feel my duty to do as a minimal sign of respect to the memory of the people who died so unjustly, taking responsibility for the chronic shortcomings of the Greek