FIRST lady Michelle Obama says her husband hasnt had a puff of a cigarette in about a year, and she is proud of him for conquering his bad habit. She said she never pestered him about quitting because she knew it was a personal challenge for him. She also hasnt talked to him much about his decision to lay off the butts. When somebodys doing the right thing, I dont mess with them, she joked. What made him finally stop? Daughters Malia and Sasha are getting to the age, she said, where her husband wants to be able to look them in the face and say he doesnt smoke. In a wide-ranging interview with a dozen reporters over lunch in the Old Family Dining Room at the White House, the first lady discussed her national Lets Move campaign to end childhood obesity in a generation. She said the year-old campaign will be expanded over the next couple of years, starting with new public service announcements she will unveil tomorrow that will potentially reach 200 million viewers. USA Today