Our series “13 Things That Saved Apollo 13″ has raised a few questions for some of our readers about spacecraft design, decisions made during the Apollo program, and general questions about spaceflight. Some of you have already left questions as comments on the articles or sent in emails. NASA engineer Jerry Woodfill, who has been featured in this series, has graciously agreed to answer reader questions, and we’ll publish the questions and Jerry’s answers in a Q&A format. Now’s your chance to ask away! Submit your questions in the comment section here, or on any of the “13 Things” articles. Or, you can email your questions to Nancy
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