Hi 'body, ok, this is a well known issue, but i still can't find a valid explanation of why FTL implies time travel. I've read lot of explanations, and each one ends up with a nonsense telling something like "if you drive a FTL car when you'll arrive you'll see yourself opening the car door and entering it, so you've travelled in the past". Of course I'll see myself getting in the car, because the light is slower than me and it will reach me after I've stopped. Another example is the "tachyon pistols" http://sheol.org/throopw/tachyon-pistols.html which is clearly an optical illusion due to the light speed "slowness". Is there any better explanation of this FTL and time travel connection, or I have just to believe it is true because someone tell it is true?