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...And tell me, you haven't been back to the states for two years.
Queen Rania: Just under two years, and during that time I had my baby.

Your fourth.

Queen Rania: He's my fourth and he's four months old today, so it's been an eventful year for me.

It's hard to believe that you and your husband, King Abdullah of Jordan, took the throne six years ago. What, in retrospect, has been the most challenging part for you as queen?

Had the potential problems of the war been underestimated?

MR. LAUER: As one of the world's most influential women, Queen Rania of Jordan has used her status to work tirelessly for the rights of young girls. And now she's calling on American girls to help through a new campaign from the U.N. Foundation. Her majesty, Queen Rania of Jordan, is with us exclusively.

Your majesty, it's nice to see you. Welcome back.

QUEEN RANIA: Thank you, Matt. It's great to be here.

MR. LAUER: It's a catchy title, "Girl Up" -- "Girl Up." And I know this begins. Just explain it to me.