With the discovery of letters containing anthrax bacteria in the United States of America in October 2001, UPU initiated a broad-based action plan to address bio-terrorism and the post.
2001年10月在美利坚合众国发现了装有炭疽细菌的信件之后，万国邮联制订了基础广泛的行动计划来应付生物恐怖主义和邮政安全问题。