On Tuesday’s NewsHour…

GULF OIL LEAK UPDATE | Oil from the Gulf Coast leak turned darker, suggesting heavier, more-polluting oil is spewing out. Tom Bearden reports from Louisiana, where the oil has begun to damage delicate barrier island ecosystems.

NEWSMAKER: BP EXECUTIVE ROBERT DUDLEY | As BP faces increasing pressure from lawmakers, Judy Woodruff talks to Managing Director Robert Dudley about the company’s next moves to cap the leak and clean up the contamination.

KHMER ROUGE GENOCIDE TRIALS | Thirty years after the Khmer Rouge’s rein of terror, those accused of perpetrating the Cambodia genocide are facing justice for the first time. Special correspondent Fred de Sam Lazaro reports on the forthcoming verdict from the war crime tribunal.

U.S., CHINA TALKS IN BEIJING | A U.S. delegation is wrapping up negotiations in China, aimed at resolving longstanding economic and foreign policy issues. Ray Suarez gets two points of view from Kenneth Lieberthal, a senior fellow at the Brookings Institution, and Ted Fishman, a journalist and China expert, on the economic and foreign policy relationships between the two countries.

AUTHOR EXAMINES THE NEXUS OF CAPITALISM, IMMIGRATION | In a book conversation, Jeffrey Brown talks with author Jeffrey Kaye about his new book on immigration and about how the search for cheap labor that powers the world’s economy perpetuates global migration.

Tuesday’s anchors are Judy Woodruff and Jeffrey Brown. Hari Sreenivasan will have the day’s other top news stories and a look at Web features, including stories from young people along the Louisiana coast, details about the Republican Party’s new Web initiative from Politico’s Alexander Burns, a slide show narrated by Fred de Sam Lazaro of the prison museum in Cambodia and a conversation with the editor of Stieg Larsson’s “Girl with the Dragon Tatoo” series on Art Beat.

We hope you join us.