SALT LAKE CITY - Kicking off a three-day, three-state tour, Mexican President Vicente Fox on Tuesday stressed the need for greater cooperation between his country and the U.S. on such things as trade, energy and security. Left unmentioned was the hot topic of illegal immigration. In a lunchtime speech to about 500 business, civic and religious leaders, Fox discussed his accomplishments during his six-year term, which ends this year, and promoted trade opportunities with Utah and the rest of the U.S. Working together, Mexico and the U.S. can improve the quality of life for citizens in both countries, he said....