NEW : Expert : Maritime crossings into the United States have become a `` new frontier '' 2009 , the United States 's navy says it rescues about 10 or 12 stranded immigrants . As part of a scam , officials say , traffickers leave migrants adrift at sea . more than 60 % of Mexican in recent survey say they would move to the United States .
NEW : Expert : Maritime crossings into the United States have become a `` new frontier '' Every month , Mexico 's navy says it rescues about 150 stranded immigrants . As part of a scam , officials say , traffickers leave migrants adrift at sea . 35 % of Mexicans in recent survey say they would move to the United States .