♪ ...carefully planned, coordinated and synchronized. ♪ performing together with a single, united purpose. ♪ that's what makes the world's leading airline... flyer friendly. ♪ welcome back to "early start." it happened again this week. a disturbed gunman opening fire in public. we're seeing it in airports. we're seeing it in malls. school halls. and it's leaving a lot of americans feeling uneasy. as brian todd reports, there's no solution in sight. >> reporter: panic and terror