Assistant to the President and Chief of Staff to the First Lady, Tina Tchen, will headline the summit.

WHITEHOUSE: Weekly Highlights,

Tina Tchen is Assistant to the President, Chief of Staff to the First Lady, and Executive Director of the White House Council on Women and Girls.

WHITEHOUSE: Travels with The First Lady: Africa

Lady Campbell is severely disabled and she spoke with the aid of her personal assistant, something that has not been allowed for more than 300 years.

BBC: Baroness makes a little bit of history