Scientific American (informally abbreviated SciAm) is an American popular science magazine. Many famous scientists, including Albert Einstein, have contributed articles in the past 170 years. It is the oldest continuously published monthly magazine in the United States(though it only became monthly in 1921).
It is only in the last century that Scientific American changed to being a monthly magazine.
A: Yes

Walter Harris (born 1925) is a British author and broadcaster. He is the author of ten published novels, several volumes of poetry, numerous articles and spoken word recordings. Recordings of his interviews and broadcasts are held at the BBC Sound Archive and the British Library.
The British Library didn't keep any of Harris' recordings.
A: No

The Rikugun Ki-202 "Shusui-Kai" (Japanese: Ki-202 , translated as "Sharp Sword, improved") was a direct development of the German Messerschmitt Me 163 "Komet" rocket-powered interceptor aircraft. None were produced before Japan's surrender that ended World War II.
The Rikugun were produced before World War II ended.
A:
No