(3rd LD) N.K. fires off 2 Rodong missiles, one explodes shortly after launch: military

(ATTN: RECASTS headline, lead; UPDATES with more info throughout)

SEOUL, Aug. 3 (Yonhap) -- North Korea on Wednesday fired off what are believed to be two mid-range Rodong ballistic missiles, but one of them exploded right after launch, the South Kore