Engineers and certified pilots may be expensive but talented young men with a teenager's grasp of risk are surprisingly affordable.
Notes from Wikiquote
Reviewing Robert Heinlein's Rocket Ship Galileo
There are no diplomatic efforts that cannot be successfully undermined by a few bigots in the field.
Quote text and notes from Wikiquote: James Nicoll (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.