FLINT, Michigan -- China is the world's second-largest automobile market after the United States, making it a natural destination for Kettering University students.

So a group of about 20 business, marketing and engineering students will tour plants and cultural attractions in Beijing, Shanghai and other cities in June for two weeks during a break in classes.

It's the first time Kettering has hosted a student trip to China.

"China is a big player," said Karen Cayo, who will lead the tour with fellow business instructor Dr. Beverly Jones. "We both have something to learn from each other."

FLINT, Michigan -- Democrat Barack Obama had a message for his Republican opponent on Monday: Visit Flint if you want to witness the effects of a lagging economy.

The presidential nominee issued the challenge to Arizona Sen. John McCain here after recalling his rival's recent claim that the economy is "fundamentally sound."

"He needs to come to Flint and meet some of these folks," Obama told an invitation-only crowd of more than 200 at Mott Community College. "You don't need to tell people in Flint ... that our economy is not in good shape. But you do need to tell John McCain."

SWARTZ CREEK -- The mystery continues surrounding what exactly happened to a sixth-grader who died after he was found at the bottom of a middle school swimming pool two weeks ago.

Listen to the 911 call

During a free swim with his classmates, Roberto, 12, was splashing around. One classmate asked Roberto if there was anything wrong, officials said.