Complex sentence: During this period, the USSR became the second country in the world to successfully develop a nuclear weapon, as well as launching the Great Plan for the Transformation of Nature in response to another widespread famine and the Great Construction Projects of Communism.
Split into simpler sentences: During this period, the USSR became the second country in the world to successfully develop a nuclear weapon. He also launched the Great Plan for the Transformation of Nature in response to another widespread famine, as well as the Great Construction Projects of Communism.