a large cargo of ammonium nitrate fertilizer exploded on board a ship docked at texas city, texas. the result was a gutting of the entire dock area. more than 560 persons were killed and 3000 injured. Property damage was estimated to be in the hundreds of millions of dollar range. the fertilizer had been manufactured in plants owned by the federal government at its order and to its specifications. at the time of the explosion, the fertilizer was en route to europe at the governments direction. Under what law may an injured person sue to collect damages from the government?