"No idea where it came from. How is that?"
They would likely know where it last came from, but not its origin. They would have to back trace it and that might take some time. Also possible that the perps wiped enough of their back trail.
Or, they DO know and they aren't saying.
My bet is that this was a terrorist probe, or from China (which is the same thing considering the amount of aid and arms sales coming out of China to the Axis of Evil).
Yup. China. Or North Korea. Or Terrorists. Or bored Canadian adolescents.
CHINA...yes, China
-----
http://www.infowar.com/mil_c4i/00/mil_c4i_101100b_j.shtml
10/11/00
China Threatens 'Electronic Pearl Harbor' Attack on U.S.
NewsMax.com
Wednesday, Oct. 11, 2000
Nations lacking military muscle could create an "electronic Pearl Harbor" that could defeat the U.S. by using electronic warfare to cripple America’s high-tech-dependent armed forces, an official Chinese report claims.
In the report, "The U.S. Military's Soft Ribs and Strategic Weaknesses," which analyzed America’s military doctrines, the strategies and tactics that Beijing could use against the U.S. were revealed by the official Chinese Xinhua news agency.
According to the authoritative American Foreign Policy Council (AFPC), the Beijing document explained how China or any other country could use electronic warfare against the U.S.:
****** more ... see link above