Unfriendly customs officers :(

skrams, my buddy is a citizen of both countries, so he can use the passport of either country to travel the world. A good friend, a young guy from Colorado, has both US citizenship and Australian citizenship. When outside the US he travels on his Australian passport as he feels it is much safer in many parts of the world. When he returns to the US, he uses his US Passport. One of our forum member's husband has dual citizenship, Canadian and US, so he can use the one of his choice also.

At one time the US wouldn't allow our citizens to have dual citizenship but the laws were changed on it many years back.