http://news.yahoo.com/u-returns-33-m...030751017.html
In a statement late Tuesday, the Mexican military said the troops "unintentionally" crossed over the bridge while they were carrying out reconnaissance on the border.
Unintentionally my ass. Don't cross the big f*cking river... how is that something you "unintentionally" f*ck up.

IIRC, armed troops crossing into our country without our govt's approval is an invasion and is grounds for war.