LONDON, ENGLAND - DECEMBER 06: The company logo is reflected in a mobile phone screen as shoppers walk past a branch of the o2 mobile network store on December 06, 2018 in London, England. The mobile ...

When F/A-18 pilots take a hard, 3.5- g turn, they stay conscious thanks to an oxygen regulator that automatically sends pressurized O 2 to both their oxygen mask and thoracic g-suit. The g-suit, a ...