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not necessarily, but it does show what our governments are prepared to do without our knowledge, even if that risks their own citizens.
If they did it then, then they are probably still doing it now in some form, only more advanced.
Theres also plenty of evidence about cloud seeding with silver iodide or dry ice.
It may or may not be as sinister as conspiracists claim (although it may be)
but im pretty sure our governments would want to continue experimenting on seeding or on simulated biological, chemical or nuclear attacks. Even if they are using particles they deem safe NOW they may be discovered to be unsafe in the future as in the M.O.D. report.
Theres plenty of evidence through history of our governments using humans as test subjects though.