(Salem, OR)  --  The State Capitol building in Salem is reopened after being shut down Saturday because of possible threats.  A senate spokesperson told Reuters they decided to cancel a floor session Saturday and close the Capitol building because of risks posed by the possible presence of militia groups.  Some right-wing militia groups have expressed support for eleven absent Republican lawmakers, who walked out last week to block a vote on a bill that would reduce greenhouse gas emissions.  At least two Republicans are needed to form a quorum required for a vote.