From Washington, this is VOA news. I'm David Byrd reporting.

Climate change protests in several U.S. cities mark President Trump's 100 day.

Thousands of people across the United States are participating in so-called People's Climate Marches largely to protest the Trump administration's environmental policies.

As Elizabeth Cherneff reports here in Washington, the demonstrations went from the Capitol to the White House.

"Under a blazing sun, concerned citizens took to the streets of Washington, marching down Pennsylvania Avenue toward the White House, protesting against the Trump administration's stance on climate change. Organizers of today's People's Climate March labeled the event a nationwide call for "climate jobs and justice." For many activists the demonstrations represented a larger symbol of resistance on the president's 100th day in office. Others hope the March will serve as a greater call to action."

Elizabeth Cherneff, VOA news, Washington.

Similar marches were held in several U.S. cities, including New York, Chicago, Denver and Atlanta.

Meanwhile, the U.S. Environmental Protection Agency is updating its website to reflect the views of the Trump administration. The agency has removed several pages from the Obama administration that explain the science behind climate change.

The EPA said in a statement the website is "undergoing changes that reflect the agency's new direction under President Donald Trump and Administrator Scott Pruitt."

Trump has stated he does not believe the science behind climate change.

This is VOA news.

Pope Francis concluded a 27-hour visit to Egypt on Saturday after delivering mass to a crowd of 25,000 Catholics and visiting a seminary.

As Edward Yeranian reports from Cairo, Francis said mass in Latin to a throng of worshipers gathered at Egypt's Air Force Stadium amid tight security.

A choir of Armenian Catholics took its turn to sing during the Saturday mass as Pope Francis made an effort to embrace Catholics from the different branches of his own church.

Pope Francis' final stop before heading to the airport was a visit to a seminary in the Cairo suburb of Ma'adi, where he appealed to clergy from different Christian sects to "accept the differences among us" in the same way that we "admire the different virtues of Saint Peter and of Saint Paul."

Edward Yeranian, for VOA news, Cairo.

The European Union has voted unanimously to adopt guidelines to negotiate Britain's exit from the bloc. The 27 leaders voted to approve the guidelines in less than 15 minutes.

European Council President Donald Tusk said several steps have to be taken before the Brexit negotiations can begin.

"Before negotiating our future relations with the UK, we must first achieve sufficient progress on citizens' rights, finances, and border issue in Ireland."

Talks with Britain are scheduled to begin shortly after it holds general elections on June 8.

Iraqi Federal Police continued their assault on Mosul's Old City with fierce house-to-house battle Saturday one day after pounding Islamic State positions in the southern neighborhoods of the Old City with missiles.

The close-quarters fighting shook the neighborhoods of Bab al Jadid and Qadheeb al-Ban just 300 meters from the grand al-Nuri mosque.

Meanwhile, the Pentagon says a U.S. service member was killed by an explosive device while fighting outside Mosul.

Iraqi troops have been focusing on the Old City surrounding the mosque where Islamic State leader Abu Bakr al-Baghdadi proclaimed a caliphate over parts of Iraq and Syria in 2014.

A Cuban military plane has crashed into a hillside in the western province of Artemisa, killing eight troops on board.

The Cuban military said in a statement that the Antonov-26 took off about 6:38 a.m. and crashed into a hillside about 65 kilometers outside Havana.

For more on these stories, visit our website voanews.com. I'm David Byrd in Washington.

That's the latest world news from VOA.