The Federal Aviation Administration claimed the O'Hare UFO incident was caused by a “hole-punch cloud,” which is a cirrocumulus or altocumulus cloud with a circular gap that occasionally forms in below-freezing temperatures.

Authors

• Person: Not available Organization: The New Yorker
  How the Pentagon Started Taking U.F.O.s Seriously | The New Yorker

Sources

• How the Pentagon Started Taking U.F.O.s Seriously | The New Yorker www.newyorker.com The New Yorker via serper

Referenced by nodes (2)

• Federal Aviation Administration entity
• 2006 O'Hare International Airport UFO sighting event