Talk about stereotyping.
I wonder if the M, C and H containers are marijuana, cocaine and heroin. The guy swimming - a "bracero" - is an undocumented migrant worker. From the web,
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Generally speaking, the Latin American migratory worker going into West Texas is regarded as a necessary evil, nothing more or less than an unavoidable adjunct to the harvest season.... One might assume that he is not a human being at all, but a species of farm implement that comes mysteriously and spontaneously into being coincident with the maturing of the cotton..."
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(Illustrator not credited.)
