Subject: Why do the ion trails of anti-particles show up in photgraphs?

It seems that if anti-matter travels backwards in time as described by 
Feynman then thier ion trails would exist in the past. If you 
start recording a collision event at the point in time of the 
collision then if anti-matter is created and moves into the past then 
its trail should not show up in a photograph from recording equipment 
that is moving into the future. If you say that the anti-matter came 
from the future and ceases to exist when the collision occurs then 
still there should be some event in the future that created that 
anti-matter particle and a recording of that event would be missing 
the trail of the anti-matter particle. I know of no recorded events 
ever that have ever been missing the evidence of anti-matter when 
anti-matter was expected.

Re: Why do the ion trails of anti-particles show up in photgraphs?