In addition to being terrorist acts, the large-scale nature of the 11 September attacks and the fact that they were directed against the civilian population would qualify them as crimes against humanity.
4. 9月11日的袭击除构成恐怖主义行径外，因其大规模性质以及以平民人口为攻击目标这一事实，也符合危害人类罪资格。