Note: To celebrate the 40th anniversary of the Apollo 13 mission, for 13 days, Universe Today will feature “13 Things That Saved Apollo 13,” discussing different turning points of the mission with NASA engineer Jerry Woodfill. After Flight Director Gene Kranz and his team in Mission Control had ascertained the true peril the Apollo 13 … Continue reading "13 Things That Saved Apollo 13, Part 4: Using the LM for Propulsion"