Wikimedia
Wikipedia: Donald Rumsfeld
A detailed biography of past Secretary of Defense Donald Rumsfeld, excellent as a starting point to begin research.
Black Past
Black Past: Rice, Condoleezza
This encyclopedia entry gives a very concise overview of Condoleezza Rice's professional life, leading up to her being named Secretary of State in George W. Bush's cabinet.
Other
Biography Shelf: Short Biography of Condoleezza Rice
An inspiring look at the life of Condoleezza Rice whose determination and focus led her to become the U.S. Secretary of State under the Bush administratrion.