Because of the military and non-military exploitation of nuclear fission , the Cold War brought forth some significant involuntary exposures to high-level radiation . The atomic bombings of Hiroshima and Nagasaki caused large-scale destruction through intense blast and fire, as well as acute and lingering radiation. Moreover, as a result of decades of nuclear-weapons production, experimentation, and testing, exposure to radiation above normal background levels occurred to scientists, technicians, military personnel, civilians, and animals. Several significant radiation-related accidents occurred at military and civilian nuclear reactors and facilities, causing direct fatalities, as well as involuntary occupational and public exposures.
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Results Among 371 randomized patients (mean [SD] age,  years; 136 [%] women), 371 completed the trial. The proportion of patients with successful first-pass intubation did not differ significantly between the video laryngoscopy and direct laryngoscopy groups (% vs %; absolute difference, −% [95% CI, −% to %]; P = .60). The proportion of first-attempt intubations performed by nonexperts (primarily residents, n = 290) did not differ between the groups (% with video laryngoscopy vs % with direct laryngoscopy; absolute difference % [95% CI, −% to %]; P = .76). The median time to successful intubation was 3 minutes (range, 2 to 4 minutes) for both video laryngoscopy and direct laryngoscopy (absolute difference, 0 [95% CI, 0 to 0]; P = .95). Video laryngoscopy was not associated with life-threatening complications (24/180 [%] vs 17/179 [%] for direct laryngoscopy; absolute difference, % [95% CI, −% to %]; P = .25). In post hoc analysis, video laryngoscopy was associated with severe life-threatening complications (17/179 [%] vs 5/179 [%] for direct laryngoscopy; absolute difference, % [95% CI, % to %]; P = .01) but not with mild to moderate life-threatening complications (10/181 [%] vs 14/181 [%]; absolute difference, −% [95% CI, −% to %]; P = .37).