LANSING (WKZO) -- Flags will fly at half-staff on Thursday in honor of Army Sergeant Mark Schoonhoven, who grew up in Plainwell and died last month from injuries suffered in Afghanistan in December.  His unit was attacked by insurgents with an improvised explosive device on December 15 in Kabul.  Sergeant Schoonhoven's funeral is scheduled for Thursday at St. Margaret Catholic Church in Otsego.