(Portland, OR)  --  A man remains missing after a boat crash in the Columbia River.  Witnesses say a power boat was passing Broughton ( BRAT-tun) Beach park yesterday when it made a sharp turn throwing both the operator and a passenger into the water.  Several boaters went to help.  The operator was rescued, but the passenger, who wasn't wearing a life jacket, went under water and didn't resurface.  The Multnomah County Sheriff's Office dive team searched the river, but wasn't able to locate the man.