Project SUNSHINE was a series of research studies to ascertain the impact of radioactive fallout on the world's population. Commissioned jointly by the United States Atomic Energy Commission and USAFProject Rand, SUNSHINE sought to examine the long-term effects of nuclear radiation on the biosphere due to repeated nuclear detonations of increasing yield. With the conclusion from Project GABRIEL that radioactive isotope Sr-90 represented the most serious threat to human health from nuclear fallout, Project SUNSHINE sought to measure the global dispersion of Sr-90 by measuring its concentration in the tissues and bones of the dead. Of particular interest was tissue from the young, whose developing bones have the highest propensity to accumulate Sr-90 and thus the highest susceptibility to radiation damage. SUNSHINE elicited a great deal of controversy when it was revealed that many of the remains sampled were utilized without prior permission from the deceased or from relatives of the dead.