Transcripts obtained by the BBC show that Bill Clinton confided in Tony Blair about his worries for Princess Diana's sons after her death in remarks that underscore the close relationship between the ex-U.S. president and former British prime minister.

The documents released by the Clinton Library offer intriguing personal exchanges, including one on Sept. 1, 1997, the day after Diana's death in an automobile accident. Blair says that "it's like a star falling." Clinton offers his fears for William and Harry, saying that "I worry a lot about those kids now."

Some 500 pages obtained through a Freedom of Information request also show discussions on the Northern Ireland peace process, the Middle East and bombing in the Balkans. The discussions are heavily redacted and some substantive comments are blacked out.