Clooney, a long-time advocate of global human rights, discussed his support of the Satellite Sentinel Project (SSP), which aims to prevent violence and uncover past atrocities in Sudan using satellite technology.
He said Sunday at a press conference after the awards ceremony that the project was responsible for retrieving images of mass graves during the last month, and praised the use of satellites for providing the International Criminal Court with evidence that led to charges for crimes against humanity.
"I'm very passionate about the idea of holding people responsible for atrocities," said Clooney.
Streep, who won last night for her portrayal of Margaret Thatcher in "The Iron Lady," took the opportunity to urge Congress to approve the building of a national women's history museum in Washington, D.C.
"I'm very interested in the stories of women, especially the unwritten history of women, and I'm trying very hard to get Congress to let us purchase land on the National Mall to build the first women's national history museum, something we really should have," Streep said.