<prompt> Pedzisa mutsara unotevera: Kuputika mabhomba hakuna kuganhurirwa kuNorth Vietnam. Dzimwe nhimbe dzomumhepo, dzakadai seOperation Barrel Roll, dzakanangana nezvikamu zvakasiyana zveViet Cong nePAVN. Iyi yaibatanidza nzira yokupa zvokudya yeHo Chi Minh, iyo yaipfuura nomuLaos neCambodia. Laos yairatidzika kuva isina kwayakarerekera yakanga yava  <response>: chiitiko chehondo yevagari vemo, ichipesana nehurumende yeLaotian inotsigirwa neU.S. kurwisana nePathet Lao nehama dzayo dzokuNorth Vietnam. 