On June 24, 1947, Kenneth Arnold was flying over the northwestern United States, when he noticed mysterious aircraft. Little by little, ufology leaves folklore and conspiracy to enter the "hard", according to information declassified by NASA, the Pentagon or the US Air Force.
This time, it is the turn of a US intelligence executive, David Grusch, to alert this week on the detention by the military authorities of an "exotic" technology. Caution remains in order, but here is revived the debate on UFOs, born one fine day in the summer of 1947.