<prompt> Pedzisa mutsara unotevera: Purogiramu yeLightning Bug yakanga yabudirira zvikuru. Nhevedzano yokugadziridza nokukurumidza drone yaivapo yairwisa yakaita kuti pave negadziriro ine kushanda kwaipfuura zvinotarisirwa, kunyange nechinoshandiswa pakutungamirira chaiva chisina kunyatsogadzirwa maererano nemitemo yezana remakore rechi21. Pasinei neizvi, Lightning Bugs haina kukwanisa kuchinja mafambiro ehondo. Kuongorora kwedrone kwakaratidza zvakajeka kuti vaNorth Vietnam vakanga vachiputsa chibvumirano chavo navaAmerica pamwero mukuru, asi utungamiriri hweU.S. hwakanga husingadi kuzvipira kugumisa hondo yahwo isingaperi. Apo vokuNorth Vietnam vakatanga kudenha kwavo kwokupedzisira mukuvamba kwa 1975 U.S. yakaita zvishomanene kukudzivisa;  <response>: Saigon yakawa pana April 30, 1975 uye hondo yakanga yapera. 