There's a mysterious flying object in the skies above Colorado that almost caused a mid-air crash. Earlier this week, a corporate jet pilot reported seeing a "large remote-controlled aircraft" near his plane while flying over Denver. Investigators say the object did not show up on radar, but radio transmissions between the cockpit and air traffic … Continue reading Was it a bird? A drone? A mechanical plane? Aviation safety expert Steven Wallace on FAA investigating reports of near mid-air collision