My characters are flying from Chicago to London in 1969 and I need to find out how easy it's going to be for them to carry drugs with them (marijuana and speed). I've searched round but I can't find the information I need, though some of it's still helpful. There's plenty about how airport security was stepped up in the 60s because of increased terrorism/hijacking, and how from 1973 all passengers and their carry on baggage had to be checked before boarding, but I'm still unsure about just how aware they would have been in 1969 about the possibility of getting busted - does this mean people weren't searched at all, unless they acted suspiciously? Were there random checks? Thanks!