Report: Japan may develop nuclear warhead

The Japanese government recently looked into the possibility of developing nuclear warhead, a news report said Monday, citing an internal government document. The Japanese daily Sankei reported that experts affiliated with the government estimated that it will take at least three to five years for Japan to make a prototype nuclear warhead. The experts did not conclude whether or not Japan should develop nuclear weapons, according to the summary of the document, dated Sept. 20 and carried by the paper.