ground, and the third also at a height of 40 feet, having been launched tactically as part of a military exercise. The third shot was, however, canceled, and the second, which became LITTLE FELLER I, was changed to a 3-foot shot to be launched in connection with a tactical maneuver (24: 1,114,73). Plans for JOHNIE BOY, the last shot added to the series, were not made until May 1962. Detonated 2 months later, JOHNIE BOY was designed to explore the cratering effects of a subkiloton nuclear device fired in a shallow emplacement (24: 94). 4.20.2 DOMINIC II Test Operations. An estimated 2,900 DOD military and civilian personnel participated at Operation DOMINIC II in Exercise IVY FLATS (Shot LITTLE FELLER I), scientific and diagnostic tests, and air support or administrative support activities. Approximately 1,000 of these participants were Sixth Army military personnel who took part in Exercise IVY FLATS, which consisted of an observer program and a troop maneuver. The observers, who wore protective goggles, witnessed the detonation from bleachers about 3.5 kilometers southwest of ground zero. Five participants from the IVY FLATS maneuver task force launched the weapon from a rocket launcher mounted on an armored personnel carrier. After the initial radiological surveys were completed, the IVY FLATS troops entered their vehicles and moved into the shot area, where they spent about 50 minutes conducting maneuvers (24: 1,3). 4.20.3 Dose Summary for Operation DOMINIC II. Most DOMINIC II participants were subject to a quarterly dose limit of 3.0 rem (gamma plus neutron) and an annual limit of 5 rem (gamma plus neutron). Cloud-sampling pilots were authorized to receive up to 3.9 rem per 13-week period because their mission sometimes required them to penetrate the clouds (24: 3,7). The following table summarizes the dosimetry data available for DOMINIC II, as well as for the first two events of the PLOWSHARE Program, GNOME and vy 136