20,000 80,000 ALTITUD' E, (ASL) 70,000 60,000 60,000 40,000 30,000 20,000 10,000 + = 100,000 a = + FEISSS SSG appa Gap EEE ES 110,006 wn 120,000 FEET Rap poe fete pp papese t ff RADIOACTIVE FALLOUT AND ITS EFFECTS ON MAN BRAVO Fiaure 1,—Upper winds at shot time. Arrows blow with the winds, and barbs indicate wind speed; full barb, 10 knots; one-half barb, 5 knots.