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President Biden is on his first trip to Asia since taking office. In South Korea and Japan, he'll try to coordinate more closely with them on priorities including strategic competition with China.

Humanitarian groups are finding cheaper ways -- namely, filtering systems -- to clean up contaminated drinking water in developing nations. That could greatly reduce diseases caused by bacteria, viruses and parasites among the billion people worldwide who drink unsafe water.

The Senate continues to debate the contentious nomination of John Bolton as U.S. envoy to the United Nations. Democrats allege Bolton may have mishandled classified information and are trying to delay a vote.

Bird lovers say they're friendly and intelligent -- but a Connecticut power utility calls them a nuisance, and it's rounding them up to kill them. Tandaleya Wilder of member station WSHU reports on the skirmish over the wild monk parakeet.

Rain runoff from roofs of buildings across the United States adds to the pollution of lakes and streams and can overburden sewage systems and storm drains. But more of those roofs are turning "green." There's a push under way to grow plants on the tops of buildings to capture rainwater and air pollutants.

The Biden administration came to office promising to revive a nuclear deal with Iran, but for months officials have said time is running out. The top negotiator is briefing Congress on the stalemate.

About 1,000 people have been evacuated from a town in Southern California after a landslide Wednesday. Multimillion-dollar houses in Laguna Beach were destroyed as residents escaped. Meanwhile, construction continues on new and glamorous homes in the area. Member station KPCC's Rob Schmitz reports.

Scientists have developed vaccines that protect against the deadly Ebola and Marburg viruses. They hope to test the vaccines -- successful in experiments with monkeys -- on humans in two to three years. The viruses are at the top of experts' list of bioterrorism threats.

A rare mushroom that grows in the old-growth forests of the Pacific Northwest may offer protection from smallpox -- an infectious disease that security experts feel may be a biological weapon of choice for terrorists who wish to attack America.

Business and labor groups are weighing in on proposed immigration legislation. The Chamber of Commerce and the AFL-CIO are both against certain provisions in the bill. But agri-business interests are backing the proposals.