U.S. Marines are headed Down Under as part of a new military agreement with Australia, announced by President Obama at the beginning of his Asia visit. The move is seen as a response to China’s growing aggressiveness. Obama said the U.S. is "stepping up its commitment to the entire Asia-Pacific,” and that 250 Marines will be stationed in northern Australia starting next year, with 2,500 personnel eventually staffing the region. Obama said the military shift will send the message to China that “with their rise comes increased responsibility. It is important for them to play by the rules of the road." China is wary of the decision, saying it may not be appropriate and requires further review.