Misc: what can't an elephant do?

Questions

ZZZ"Home is where the --------- is."- Anonymous?

"Honest --------------- is often a good sign of progress."- Mohandas K. Ghandi?

"------------ has ruined more marriages than infidelity."- Charles McCabe?

"Houston, Tranquility Base here. The ----------- has landed."- Neil Alden Armstrong?

"How is it that the person in front of you at the --------------- always has one item that requires a summit conference?"- JoAnn Thomas?