   Mexico's new leader has a message for U.S. officials as he
heads to Washington this week: Ties between the neighboring
nations must go beyond the drug war. Just four days before his
inauguration, Mexican President-elect Enrique Pena Nieto will
meet with U.S. President Barack Obama on Tuesday. And he says he
wants to reshuffle the list of priorities the United States and
Mexico share.   In a remote town in northern Mexico, a 10-year-
old-boy is struggling with his homework. His name is Oscar
Castellanos and the fifth grader is getting extra help from his
father because he's having trouble adjusting to his new school.
The student enrolled at Leona Vicario Elementary in the town of
Cananea is technically a foreigner in his father's land. Oscar
was born in Arizona and is a U.S. citizen. He recites the U.S.
pledge of allegiance by memory without hesitation. His English
accent is that of a boy raised in the American southwest.   A
Mexican beauty queen was killed during a weekend shootout in the
restive northern s