Apparent hackers have taken control of the public address systems at four airports in North America.
In other news, International Monetary Fund chief Kristalina Georgieva plans to visit Ukraine, although the date has not been determined.
Additionally, Apple has unveiled new product updates, including a refreshed MacBook Pro and an iPad Pro.
The US Treasury Department has also purchased Argentine pesos in the open market.
No specific details were given about the hacking incidents or the IMF visit.
Author's summary: Hackers target airport PA systems.