Taliban victim Malala Yousafzai has told US President Barack Obama to end drone strikes on Pakistan.
Malala had been considered a front-runner for the prize and was in Washington to speak at two events.
"I thanked President Obama for the United States' work in supporting education in Pakistan and Afghanistan and for Syrian refugees. I also expressed my concerns that drone attacks are fuelling terrorism. Innocent victims are killed in these acts, and they lead to resentment among the Pakistani people. If we refocus efforts on education it will make a big impact," she said.
The 16-year-old also called for greater cooperation between the governments of the US and Pakistan.
The president, himself a Nobel Prize winner, signed a proclamation to mark Friday as the International Day of the Girl. The proclamation says in part that "on every continent, there are girls who will go on to change the world in ways we can only imagine, if only we allow them the freedom to dream."
Malala was shot in the head in October 2012 while she was going home from school. She was flown to a hospital in the UK, where she now lives. Her memoir I am Malala was published on Tuesday.