Brian Fung, a technology reporter for The Washington Post, says history has shown a ban on certain weapons would be hard to *enact, let alone enforce. For example, despite many major powers signing the 1925 Geneva Protocol banning the use of chemical and biological weapons, other countries such as Japan and the US did not become *signatories until as late as the 1970s, according to the Arms Control Association. And even then, *allegations were still made about the use of such weapons in violation of the ban.