OK, please explain this to me. You mentioned 14km. That's awesome! I thought this wireless stuff required line of sight. Is this not true?

I would love to get a wireless connection between my place and my friend's. He is approximately 2.5 miles as the crow files in an apartment building. I live in a residential neighborhood with big trees, etc. I had heard that trees are an issue.

What conditions are required to get a decent speed wireless connection over this kind of range? Where do I go to learn more about this?

Thanks in advance.

Jim