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North Korea said the Wednesday test verified the "reliability of fuel ampoule system under the winter weather conditions", suggesting it is seeking to ensure the stability of such systems.

Pak Jong Chon, a senior official who observed the test, said the North plans to expand the ampoule system to all of its liquid-fuel missiles.

Lucas needed immunoglobulin - a very expensive medication - to deflate his heart, but luckily an adult patient who had bought his own had donated one leftover ampoule to the hospital.

Three Chinese nationals and a Zambian were detained at a warehouse in Gauteng, South Africa, where ampoules containing 2,400 doses were discovered.

During one test, an ampoule of the gas broke and he was sprayed with phosgene.