The only second world war deaths from enemy action on American soil were victims of a balloon bomb, Japans desperate attempt to avenge US air raidsIt was 5 May 1945, a warm spring day, and the second world war felt very distant to Annie Fagen, aged 13, as she prepared to join friends for a picnic in the Oregon woods.They were already up in the forest, a bucolic landscape scented with sage, scouting for a creek where they could fish and lay blankets.