In our news wrap Friday, a British man was sentenced to life in a U.S. prison without parole for the Islamic State killings of four Americans, the U.S. pledged $775 million in additional military aid for Ukraine, the former Roman Catholic archbishop of Quebec, Canada denied sexually assaulting a woman, and the U.S. Transportation Department is urging airlines to do more for delayed travelers. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

The federal government on Tuesday announced a second round of water restrictions to states that depend on the Colorado River Basin. The move comes as the American West faces unprecedented challenges to preserve water that continues to recede rapidly. Jennifer Pitt, Colorado River program director for the National Audubon Society, joins Stephanie Sy to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

In our news wrap Sunday, online threats against federal officials are increasing after the FBI's search of Trump's home, a man drove into a Capitol barrier and died in an apparent suicide, a Palestinian gunman opened fire on a bus in Jerusalem, author Salman Rushdie is "on the road to recovery" after being stabbed in New York, and Freya the walrus has been euthanized by Norwegian authorities. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

This summer has seen record-high temperatures around the world, but the damaging effects of heat do not stop at the water's edge. In Europe, the Mediterranean Sea has been experiencing elevated temperatures since May, with deadly consequences for delicate underwater ecosystems. Ali Rogin reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

In our news wrap Saturday, a Trump attorney told the Justice Department that all classified documents had been returned, the Southern Baptist Convention's handling of sexual abuse claims is under investigation, Salman Rushdie's alleged attacker is charged with attempted murder, Sen. Sinema's campaign donations from Wall Street come under scrutiny, and Italy's largest lake drops near historic lows. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

On a multi-country tour of Africa this week, Secretary of State Antony Blinken has been making the case that the U.S. can be a quote "equal partner" with African nations. In that vein, he recently announced a new partnership between the U.S. and the Democratic Republic of Congo in an effort to protect some of that nation's natural treasures. William Brangham reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

As the House prepares to cast the final vote Friday on the Democrats' sweeping climate and health care bill, we take a look at how the legislation also impacts tax policy. Michael Graetz, a professor of tax law at Columbia University and co-author of "The Wolf at the Door: The Menace of Economic Insecurity and How to Fight It," joins Lisa Desjardins to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

Residents of the Southwest including many Indigenous people have for years been exposed to high levels of radiation from uranium extraction and refining, a toxic legacy from the Cold War's weapons program and nuclear power generation. Stephanie Sy reports in partnership with investigative news outlet ProPublica on a community's fight for survival and to hold a company and government accountable. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

In the sea of videos on TikTok today, dance crazes and cute animals are unavoidable on the video-sharing app. But below the surface -- underwater to be more precise -- are some special, critically endangered crustaceans who have unintentionally hopped on the trend. Lisa Desjardins reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders

Social media can certainly motivate people for good and otherwise. Calls to action to clean up the oceans, rivers, and beaches have galvanized volunteers and gone viral. But given the magnitude of the problem, how should we assess the impact? Paul Solman looks at one YouTube-focused campaign that has hit a particular chord, as part of our continuing coverage of the global plastic problem. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders