This document discusses different perspectives on why the United States failed in Vietnam. Source A describes General Westmoreland's view that negative media coverage helped turn US public opinion against the war. Source B explains Ho Chi Minh's view of effective guerrilla tactics like harassing the enemy. Interpretation 1 argues that superior US firepower was ineffective against guerrilla warfare. Interpretation 2 contends that initially pro-war media began questioning the lack of progress and turned against the war after reporting on the Tet Offensive.