Northern UFOs - Theories

: This theory is based on the observations that distant objects can be observed across the pole by refraction of light due to extremes of temperatures in the atmosphere. I've received e-mail from people arguing both sides to this theory...
: "HAARP (High Frequency Active Auroral Research Project) is a Tesla transmitter, the largest in the world, and it is right here in Alaska at Gakona, and we Alaskans especially ought to be concerned about it. It consists of a 30 acre field of antennas that beam powerful radio signals into the upper atmosphere. It is also called an ionospheric heater and it disrupts the earth's magnetic field, which keeps the earth in balance with the sun and moon. What HAARP is able to do is transmit power into a focused beam that can be transferred to any place on earth. The receiving sites can then transmit their own ELF (Extremely Low Frequency) electromagnetic waves. (quoted from the HAARP Page)
: This seems to be a very likely explanation. With so many "black" projects underway, it seems very probable that some top secret plane could have been zooming around the skies in the NWT...