Aum Shinrikyo Aum Shinrikyo

In Shoko Asahara's eight-year trial, he spoke incoherently and never explained the motive for the attacks or acknowledged responsibility. He is seen here in 1989 in Bonn, Germany. Roberto Pfeil/AP hide caption

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Roberto Pfeil/AP

Katsuya Takahashi, the last fugitive connected to the 1995 sarin attack on Tokyo's subway system, after his arrest today. Jiji Press/AFP/Getty Images hide caption

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Jiji Press/AFP/Getty Images