"This is unlikely to prevent many more such incidents. The killing of large numbers of civilians by American forces, through indisciplined firing or as a result of their heavy reliance on air-strikes, has been a bitter feature of the campaigns in Afghanistan and Iraq—just as it was in Vietnam. Indeed, later on Tuesday at least 21 civilians were killed in air-strikes in the southern province of Helmand, according to Asadullah Wafa, its pro-American governor. In Iraq on Wednesday, according to local security sources, an American helicopter involved in an attack against suspected insurgents killed a number of children at a primary school north of Baghdad."