The Israeli military found a USB key with instructions for the production of a “cyanide dispersion device” on the body of a Hamas operative who participated in the Oct. 7 terrorist attack, according to two Israeli officials and a copy of a classified Israeli Foreign Ministry cable obtained by Axios. It is not clear from the file whether Hamas had any serious or operational plan for using makeshift chemical weapons or whether the group had attempted to produce them. The Israeli Foreign Ministry’s weapons of mass destruction non-proliferation department sent a classified cable to Israeli embassies in dozens of capitals...