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Japan has successfully launched another optical (picture taking) spy satellite. This one joins two other optical birds and one radar satellite. This most recent satellite launch cost $109 million. The satellite cost quite a bit more. In early 2007, Japan lost the use of one of its two radar satellites. The "No. 1 radar satellite", which went into orbit in March 2003, was supposed to last for five years. But the bird has been having electrical problems, and had to be written off. Nearly three years ago, Japan launched its fourth spy satellite into orbit, using a Japanese made rocket....