AndeventhoughthousandsofpeoplehaveclimbedtothetopofMountEverest, whichis 5-and-a-halfmileshigherthansealevel, only a coupledozenhavereachedthe 7-miledepthoftheChallengerdeep, soit's largelyunexplored.
Theywerekindenoughtoprovideuswiththevideoyou'reabouttosee, and I hadtheopportunitytointerviewMr. McCallumabouttheexperiencenotlongafterhehitrockbottomandthenresurfacedintheSpringof 2021.