Let's take a look at what's going on in 'The World Now'.
One of the suspected killers of Saudi journalist Jamal Khashoggi was arrested at Charles de Gaulle Airport on Tuesday, as he was about to board a flight to Riyadh.
A source says a former Royal Guard of Saudi Arabia was the suspected killer, and was on a French wanted list.
He was arrested on the basis of a warrant issued by Turkey in 2019, and French prosecutors will now begin proceedings for a potential extradition there.
The arrest of the suspected killer came just days after French President Emmanuel Macron held face-to-face talks in Saudi Arabia with de facto ruler Crown Prince Mohammed bin Salman, becoming the first major Western leader to visit the kingdom since Khashoggi's murder.
A U.S. intelligence report from March noted that the Crown Prince had approved the operation to kill or capture Khashoggi, however, the Saudi government has long denied any involvement.
Khashoggi was a long-time critic of Prince Mohammed, and was last seen entering the Saudi consulate in Istanbul in October 2018.
His remains have not been found, while Turkish officials believe his body was dismembered and removed from the premises.
Israel on Tuesday announced the completion of a sensor-equipped underground wall on its side of the Gaza border.
The construction of the wall is said to be a counter-measure developed after Hamas militants used tunnels to blindside its troops in the 2014 clash.
Going public with the project in 2016., Israel also revealed an above-ground fence, a naval barrier, radar systems and command and control rooms.
"Today, with the completion of this project, which is mostly hidden, we deprive Hamas of one of the capabilities it tried to develop, and it places an 'iron wall' of sensors and concrete between the terror organization and the residents of the Israel's south."
The defense ministry said the "smart fence" includes hundreds of cameras, radar and other sensors, and spans 65 kilometers across and 6 meters high.
The completion of the fence required the use of 140-thousand tons of iron and steel, and took three and a half years to complete.
Tesla CEO Elon Musk warns, the biggest threat to humanity is the declining birthrate, adding that the civilization will "crumble" if people don't start having more children.
Speaking at the Wall Street Journal's annual CEO Council on Monday, the father of six, made the remark in response to a question about how his company's not-yet-released Tesla Bot could solve labor issues.
Musk said the Tesla Bot could be increasingly critical to businesses if human labor supply falls.
His latest comment wasn't the first time he warned of the declining birthrate, as he said in 2017 that "the population bomb" could soon go off, adding the world's population is accelerating towards collapse.
Lee Seung-jae, Arirang News.