Anti-Matter Falling Speed - Experiments & Results

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Has the experiment been done to drop anti-matter and see if it falls the same speed as regular matter? I seem to have a memory of an experiment to drop anti-protons from quite some time ago. But I don't seem to find a reference when I look.
 
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No, but here's a http://aegis.web.cern.ch/aegis/ one.
 

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