Prime minister Elio Di Rupo has expressed his support for the Jewish community and said: "All Belgians are united," after the shooting in Brussels.
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He was also charged with common assault, larceny and being disorderly on licensed premises after his early morning detention.
Blue has spent 300 days waiting for a new owner.
The band played at a concert in Montana on Monday aimed to encourage young people to vote in November’s mid-term elections.