mailing of explosives, officials able to find him in part to a fingerprint discovered on one of the envelopes. >> we can confirm that 13 ieds were sent to various individuals across the country. each twice consisted of roughly six inches of pvc pipe, a small clock, a battery, some wiring and what is known as energetic material, which is essentially potential explosives and material that give off heat and energy through a reaction to heat, shock or friction. though we're still analyzing the devices in our laboratory, these are not hoax devices. >> the 14th device was discovered after that news conference and we should note there could be more. before he left for the rally today trump said that despite