UnScramble this Word: m u t m e n l o?

Questions

In 1961 Yuri A. Gagarin becomes first man to orbit Earth aboard ---------- 1.?

In 1979 ---------- 33 returns to Earth.?

In 1981 First launch of the space shuttle " ---------- " with John Young and Bob Crippen at the controls.?

In 1899 Alfred ---------- , inventor of the game 'Scrabble', born.?

In 1906 Samuel ---------- , playwright, born.?