Why Aerial Refuelling Is Most Challenging Manoeuvre For A Pilot | Richard Hammond's Big

Richard Hammond joins the crew of the C-5M Super Galaxy to see how they fly one of the world's largest military aircraft during one of the most difficult aerial operations; aerial refuelling. Subscribe to Discovery Australia for more great clips: https://bit.ly/DiscoveryAustralia #DiscoveryAustralia #RichardHammondsBig