Read the following text to answer the question! Bacharuddin Jusuf Habibie was born on June 25, 1936 in the sleepy seaside town of Pare Pare in the Indonesian state of South Sulawesi. The fourth of eight children, he was nicknamed "Rudy" at an early age. His father, Alwi Abdul Jalil Habibie, was a government agricultural official who promoted the cultivation of cloves and peanuts. His grandfather was a Muslim leader and an affluent landowner. As a child, Habibie liked swimming, reading, singing, riding his father's racehorses, and building model airplanes. His interest in building model planes continued while he excelled in science and mathematics at the Bandung Institute of Technology. His mother, R.A. Tuti Marini Habibie, arranged for him to continue his studies in Germany. At the Technische Hochschule of Aachen, Habibie studied aircraft construction engineering. In 1962, on a visit to Indonesia, he married H. Hasri Ainun Besari, a doctor. They had two children, Ilham Akbar and Thareq Kemal, both born in Germany. After graduating with a doctoral degree from the Aachen Institute in 1965, Habibie joined the aircraft manufacturing firm Messerschmitt-Boelkow-Bluhm, rising to the rank of vice-president. As a research scientist and aeronautical engineer, he helped design several planes, including the DO-31, an innovative vertical takeoff and landing craft. He specialized in solutions for aircraft cracking, gaining the nickname "Mr. Crack" as one of the first scientists to calculate the dynamics of random crack propagation. He also became involved in international aircraft marketing activities and NATO's defense and economic development. According to the text, when did Habibie marry Ainun?

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Read the following text to answer the question!

Bacharuddin Jusuf Habibie was born on June 25, 1936 in the sleepy seaside town of Pare Pare in the Indonesian state of South Sulawesi. The fourth of eight children, he was nicknamed "Rudy" at an early age. His father, Alwi Abdul Jalil Habibie, was a government agricultural official who promoted the cultivation of cloves and peanuts. His grandfather was a Muslim leader and an affluent landowner.

As a child, Habibie liked swimming, reading, singing, riding his father's racehorses, and building model airplanes. His interest in building model planes continued while he excelled in science and mathematics at the Bandung Institute of Technology. His mother, R.A. Tuti Marini Habibie, arranged for him to continue his studies in Germany. At the Technische Hochschule of Aachen, Habibie studied aircraft construction engineering.

In 1962, on a visit to Indonesia, he married H. Hasri Ainun Besari, a doctor. They had two children, Ilham Akbar and Thareq Kemal, both born in Germany.

After graduating with a doctoral degree from the Aachen Institute in 1965, Habibie joined the aircraft manufacturing firm Messerschmitt-Boelkow-Bluhm, rising to the rank of vice-president. As a research scientist and aeronautical engineer, he helped design several planes, including the DO-31, an innovative vertical takeoff and landing craft. He specialized in solutions for aircraft cracking, gaining the nickname "Mr. Crack" as one of the first scientists to calculate the dynamics of random crack propagation. He also became involved in international aircraft marketing activities and NATO's defense and economic development.

According to the text, when did Habibie marry Ainun? $\;\;$