Why we need to prepare for an alien invasion

On the 08 October 1955 General Douglas MacArthur made ​​the first of two public statements about the possibility of an extraterrestrial threat:

"The nations of the world must unite for the next war, because it is an interplanetary war. The peoples of the earth must someday make a common front against attack by people from other planets."

General MacArthur had knowledge of secret military involvement in the UFO subject from the second world war. Supposedly he was, after the UFO incident over Los Angeles in 1942, in the creation of a unit for interplanetary phenomena (Interplanetary Phenomenon Unit IPU) involved. The existence of the IPU in 1984, was finally confirmed by inquiries in relation to the Freedom of Information Act (FOIA) by the army. In light of MacArthur's military duties and his alleged role in the IPU, he was aware of the military records on UFOs. This contributed to his belief that the aliens are a threat to national security, which could unite the countries of the world.