Associated Press WriterWASHINGTON (AP) -- Mexican President Vicente Fox opened a state visit Wednesday by challenging President Bush to work out a bilateral migration agreement before the end of year.

Flanked by Bush on the White House South Lawn, Fox said he envisions an agreement that will allow him and Bush, before the end of their respective terms in office, "to make sure that there are no Mexicans who have not entered this country legally in the United States and that those Mexicans who have come into the country do so with the proper documents."