Lab-grown diamonds are taking over -- and big gem is sweating. Brides-to-be are snapping up bigger, cheaper, jaw-dropping lab-grown rocks, and the once-untouchable natural diamond market is feeling the heat.

Leadership Courage Is Being Tested -- Not By Ideology, But By Endurance Last semester, I was sitting in Harvard Yard with a small group of graduate students when a question I wasn't prepared for cut through preparation, posture, and pretense.