(Portland, OR)  --  Bail is set at more than 800-thousand dollars for a man who's accused of shooting at police during a standoff at a Portland mobile-home park.  Sixty-three-year-old Timothy James Bucher, who's a registered sex offender, was booked yesterday morning on multiple charges, including attempted murder.  Police say Bucher fired dozens of rounds at officers, threatened a pregnant woman with a knife, and confronted her husband with a handgun at the Fox Run mobile home park in Northeast Portland Tuesday night.  Officers returned fire, but no one was injured.