Tear gas has been fired to disperse demonstrators in Egypt, at some of the first protests since President Abdul Fattah al-Sisi took power in 2014. Hundreds of Egyptians filled Tahrir Square in Cairo demanding his resignation. The protests were in response to corruption allegations against President Sisi's government.

Also in the programme: the United States sends troops and missile systems to Saudi Arabia; and new research reveals that many doctors don't understand dementia and its treatments.

(Picture: Protestors in Cairo, Egypt. Credit: EPA/STRINGER)

The movement was started by the young Swedish activist Greta Thunberg who promoted the idea that children should stay out of school and make their voices heard. It has spread to older students and workers, with millions taking places in marches around the world today. The demonstrations come just three days before the start of a UN summit on climate change in New York.

Also on the programme, a newspaper report states a whistle-blower has claimed President Trump made an inappropriate promise to a foreign leader during a phone call. Donald Trump denies it as fake news but the complaint is now in the hands of spy agencies.

And oil prices spiked after drone attacks on Saudi Arabia - how big has the impact been on global markets?

(Picture: Youths hold placards and shout slogans as they participate in a climate strike in New Delhi. Credit: Money Sharma/AFP/Getty Images)

Dozens of civilians have been killed in Afghanistan in the latest attacks in a surge of violence following the collapse of peace talks earlier this month.

Also in the programme: Nuclear bosses cleared over Fukushima disaster; and Netanyahu and Gantz compete over leadership in Israeli election.

Picture: Afghan security forces investigate the site where a Taliban car bomb detonated near an intelligence services building in Qalat in Zabul province. Credit: Getty Images.

Preliminary results from Israel's second general election in five months indicate that the two main parties are deadlocked. With ninety percent of the vote counted, it appears that neither the Likud party of the prime minister, Benjamin Netanyahu, nor the rival Blue and White alliance has a clear path to forming a coalition government.

Also in the programme: Saudi Arabia's amabassador to the UK warns against a hasty response to the attack on his country's oil industry; and the vice-president of Venezuela's National Assembly, Edgar Zambrano, has been released from a military base after being detained there for four months.

Picture: This combination picture created on September 18, 2019 shows, Benny Gantz (R), and Israeli Prime Minister Benjamin Netanyahu (L). Credit: Getty Images.

The United States has issued satellite images and cited intelligence to back its claim that Iran was behind attacks on major Saudi oil facilities. (Iran denies involvement in Saturday's air attacks, which were claimed by Iran-aligned Houthi rebels in Yemen). Global oil supplies have been cut by 5% and prices have soared.

Also in the programme: The British Prime Minister Boris Johnson has been meeting the EU Commissioner Jean-Claude Junker to discuss Brexit; and financial regulators are questioning Facebook officials in Switzerland about the company's plans to launch its own cryptocurrency, the Libra, next year.

Picture: A satellite image shows an apparent drone strike on an Aramco oil facility in Harad, Saudi Arabia September 14, 2019. Credit: Planet Labs Inc.

The United States cites intelligence to back its claims that Iran was behind Saturday's attacks on Saudi oil facilities. Hear a rejection of those allegations from Tehran.

Also in the programme: Former CIA contractor turned whistle-blower Edward Snowden says he'd like to return to the United States; podcasters eye up Africa for growth in the industry; and are government agricultural subsidies around the world partly responsible for making climate change worse?

Photo: Satellite images of Saudi oil facilities. Credit: US Government and Digital Global.