The American and state of Iowa flags are flying half-staff in front of Centerville City Hall in honor of fallen Centerville Marine Master Sgt. Travis W. Riddick. Kim Crego, city clerk and commissioner of municipal services, said the flags will continue to fly half-staff until Riddick's body is laid to rest. Jim Senior, Centerville mayor, is requesting residents with American flags to fly them at half-staff until after Riddick's funeral service. Riddick, 40, a Centerville native, was killed Thursday, Jan. 19 in a helicopter crash in Helmand province, Afghanstan.