Today the Lehman Moment turns four.

FORBES: The Lehman Moment Turns Four

When not sure if another Lehman Brothers moment is coming, it is best to prepare as if one is.

FORBES: Global Business Confidence Falls To 2008 Levels

Although Erin had not brought Lehman to that moment, she chose to resign to show the world that the firm was making changes.

FORBES: How Women Executives Who Leave Their Roles Affect the Next Generation of Women Leaders