I've always tried to make sure that what I do really connects with the broader agenda of what my husband Barack Obama is trying to do.... But I also find that I have to be very passionate myself about the issue to be able to represent it well. One of the big issues that I've talked a lot about...is childhood health, nutrition and obesity.

I think my mother taught me what not to do. She put us first, always, sometimes to the detriment of herself. She encouraged me not to do that. She'd say being a good mother isn't all about sacrificing; it's really investing and putting yourself higher on your priority list.

You can be a good mom and still work out, get your rest, have a career - or not. My mother encouraged me to find that balance.

I try to tell young people to get in shape now, because it's easier. If you're 30 and want to drop 10 pounds, all you have to do is just walk.

I am desperate for change - now - not in 8 years or 12 years, but right now.

This is really what the White House is all about. It’s the “People’s House.” It’s a place that is steeped in history, but it’s also a place where everyone should feel welcome. And that's why my husband and I have made it our mission to open up the house to as many people as we can.

We need all hands on deck, and that means clearing hurdles for women and girls as they navigate careers in science, technology, engineering, and math.