[quote=Kal-El]
I'm going to respond to all three of these with one word......okay three words.

Non-fiction...............and magic.
[/quote]

Wikipedia: 

For an observer standing on the ground with h = 1.70 metres (5 ft 7 in) (average eye-level height), the horizon is at a distance of 4.7 kilometres (2.9 mi).

How will you aim? Magic won't fix that.