An infinite misfortune, like a fate of malediction that hits all: in this way it can be synthetized the history of space shuttle Columbia, crashed on February 1 and cost the life of 7 astronauts. But yesterday an other fact has made this vicissitude more bitter, when a Bell 407 helicopter, of the Forest Service, crashed at 4:00 pm in the zone of Broaddus, in east Texas, while it was searching for...