That successful entrepreneurs have to be gritty is not news. Tenacity and perseverance enable founders to accomplish goals that may take years to achieve. People who start businesses that endure surmount a host of challenges (like wondering how to generate enough cash to keep the doors open and also feed themselves) along the way. Focus, discipline, and tenacity are also hallmarks of great leaders. Little demonstrates a leader’s grittiness more than the ability to effectively navigate a disaster. The movie, Apollo 13, demonstrates crisis management and gritty leadership at their best. Leadership Lessons from Apollo 13 Remember the scenes where disaster after disaster happen? The life-threatening drama begins when Jack Swigert replaces Ken Mattingly as pilot a few days before Apollo 13’s scheduled lift off. Bringing Swigert on disrupts the team’s chemistry, cohesion, and levels of trust. Then, the oxygen… …