[Illustration: _Wind of hurricane drive pine board (10 feet by 1 inch by 3 inches) through the tough trunk of a palm tree in Puerto Rico, September 13, 1928._] [Illustration: _Official U. S. Navy Photograph_ _Looking down from plane at the surface of the sea with wind of 15 knots (17 miles an hour)._] [Illustration: _Official U. S. Navy Photograph_ _Sea surface with winds of 40 knots (46 miles an hour)._] [Illustration: _Official U. S. Navy Photograph_ _Sea surface with winds of 75 knots (86 miles an hour)._] [Illustration: _Official U. S. Navy Photograph_ _Sea surface with winds of 120 knots (138 miles an hour). Tops of big waves are torn off and carried away in a white boiling sheet._] [Illustration: _Superfortress B-29 used by Air Force for hurricane hunting._] [Illustration: _Official U. S. Navy Photograph_ _Neptune P2V-3W used by Navy for hurricane hunting._] [Illustration: _Official U. S. Navy Photograph_ _Navy crew of hurricane hunters._] [Illustration: _Air Force Photo_ _Air Force crew being briefed by weather officer before flight into hurricane._] [Illustration: _Official U. S. Navy Photograph_ _Conditions at birth of Caribbean Charlie in 1951._] [Illustration: _In the foreground, part of a spiral squall band, an “arm of the octopus.”_] [Illustration: _Photographed by McClellan Air Force Base_ _Through Plexiglas nose, weather officer sees white caps on sea 1,500 feet below._] [Illustration: _Official U. S. Navy Photograph_ _Navy aerologist at his station in nose of aircraft on hurricane mission._] [Illustration: _Official Defense Department Photograph_ _Radar operator in foreground; navigator in background._] [Illustration: _Official Defense Department Photograph_ _Maintenance crew goes to work on B-29 after return from hurricane mission._] [Illustration: _USWB—Miami Daily News_ _City docks at Miami after passage of Kappler’s Hurricane in September, 1945._] [Illustration: _Official Defense Department Photocopy_ _Positions of crew members in B-29 on hurricane mission._] AFT ENTRANCE HATCH RADIO OPERATOR RIGHT SCANNER (CREW CHIEF) RADIOSONDE OPERATOR LEFT SCANNER (DROPSONDE OPERATOR) ENGINEER COPILOT WEATHER OBSERVER NAVIGATOR RADAR OPERATOR FORWARD ENTRANCE HATCH PILOT