(Longview, WA)  --  An investigation is ongoing into a fire that destroyed a bed and breakfast along the Columbia River.  Firefighters responded to the B-and-B on Willow Grove Road in Longview, Washington early yesterday morning to find the building "heavily involved" with flames.  Fire crews knocked the blaze out in about an hour.  Six people were staying at the B-and-B at the time of the fire, and officials say they were all able to escape safely.  Officials say the home is a total loss.