What's the Difference Between Investigation and Inquiry?

There were a total of three contemporary inquiries into the crash. These inquiries all fail to conclusively determine the cause of the crash. There's a lot of hedging, right? The Rhodesians in both their inquiry, inquiries and investigations. They find no evidence of bombs, nor missiles, nor hijacking. But their official report says a lot of curious stuff. Two of the Swedish bodyguards aboard seem to have died from multiple bullet wounds. Whoa, before the plane hits the ground. Oh, it's in my head now. Yeah. Well, we have investigated. Okay. I would think they would go on the other way. You inquire and then you investigate. That's why