The report says up to one billion birds die each year from flying into objects like power lines, windows and tall buildings.

VOA: special.2009.05.12

Although jets are pressurized so that the cabin environment resembles an altitude of around 8, 000 feet, some people report that flying (possibly from the changes in pressure and resulting decrease in oxygen concentration) causes symptoms such as headache, fatigue and nausea.

CNN: Is it OK to fly after a head injury?

CNN's Gary Tuchman, accompanying airmen aboard an Air Force HC-130 search-and-rescue and refueling plane flying over Iraq, filed this report.

CNN: Refueling 500 feet over Iraq 'keeps you on your toes'

Nancy Salzman, Raniere's business partner and NXIVM's president, is using the apartment, says one source, and two sources report that Salzman is flying around in a private jet owned by the sisters.

FORBES: OCTOBER 13, 2003