ABC News’ Yunji de Nies reports:Michelle Obama has landed another magazine cover – not for fashion, but for her Let’s Move! initiative. The First Lady wrote the cover story for next week’s Newsweek. The March 22nd magazine cover shows the First Lady with an apple and title “Feed Your Children Well: My Fight Against Childhood Obesity.” Her article touches on familiar themes from her recent speeches on the topic – centering on idea that adults, not kids, need to take charge of this problem.She writes, “And let's be honest with ourselves: our kids didn't do this to themselves. Our kids don't decide what's served in the school cafeteria or whether there's time for gym class or recess. Our kids don't choose to make food products with tons of sugar and sodium in supersize portions, and then have those products marketed to them everywhere they turn. And no matter how much they beg for fast food and candy, our kids shouldn't be the ones calling the shots at dinnertime. We're in charge. We make these decisions.”The First Lady says the solution to childhood obesity rests not with a bill from Congress or executive order from her husband, but “Instead, it's about what all of us can do to help our kids lead active, healthy lives: parents making healthier choices for their families; mayors and governors doing their part to build healthier cities and states; and the private sector doing its part as well—from food manufacturers offering healthier options to retailers understanding that what's good for kids and families can be good for businesses too.”Tomorrow, she’ll address the Grocery Manufacturers Association, whose members may all not be keen on the kind of changes the First Lady wants. Her article in Newsweek is timely – on Wednesday she joins the magazine in a Q and A forum called "Challenges and Ways to Promote Health and Wellness in America's Communities” at the Newseum in Washington, D.C.