Which island was considered a steppingstone for an invasion of the japanese mainland

Iwo Jima  - although not strictly a stepping stone it gave the US an airbase that was reasonably far forward and at the same time deprived the Japanese of an airbase allowing bombing raids on mainland Japan to proceed with less interference. 

lancelot said to the beautiful ellen i c u r a b u t l n (i see you are a beauty lancelot was the greatest and worst of the knights who became the king's champion and undertook quests in the king's name. he became the adulterous lover of queen guinevere, and they had a son named galahad.

during both period congress passed law restricting the civil liberties of american citizen that meet with the overall public support is the one statement that explain the rate scare of the 1920 and 1950 is very similar