Samantha Power appointed as US envoy to UN
Irish-born woman named to post by President Barack Obama
President Barack Obama has named Samantha Power to replace outgoing US ambassador to the UN Susan Rice. Photograph: Joshua Roberts/Reuters
US president Barack Obama (right) speaks as former aide Samantha Power listens during in the Rose Garden at the White House in Washington, DC. Photograph: Alex Wong/Getty Images
An award-winning author and former journalist, Ms Power was a special assistant to the president and, until earlier this year, senior director of multilateral affairs and human rights at the National Security Council.
Video: Samantha Power's acceptance speech
She lived in the Dublin suburb of Castleknock until age nine, and emigrated with her family to Pittsburgh in 1979 before moving to Atlanta. She covered the Balkan Wars in the 1990s, filing news reports to the Boston Globe, the Economist and the New Republican.
Her book A Problem from Hell: America and the Age of Genocide, won a Pulitzer Price after she graduated from Harvard in 1999, and marked her out as a foreign policy expert.
She played a crucial role in the Obama administration’s decision to intervene militarily in Libya in 2011.
She left work in February to spend more time with her children, Declan and Rian. She is married to Cass Sunstein, a former head of the White House’s information and regulatory affairs office.