Buffett pressured to step down as chairman, conservative groups target Gates ties https://ja.wikipedia.org/wiki/%E3%82%B8%E3%82%A7%E3%83%95%E3%83%AA%E3%83%BC%E3%83%BB%E3%82%A8%E3%83%97%E3%82%B9%E3%82%BF%E3%82%A4%E3%83%B3
http://www.nicovideo.jp/watch/sm42193945