Western leaders gathered in Lithuania on Monday to demonstrate solidarity with Ukraine amid glimmers of disunity over Washington's controversial decision to supply cluster bombs to Kyiv. President Volodymyr Zelensky voiced hope that today's NATO summit in Vilnius would provide a "clear signal" that Kyiv could join the alliance after the war. Russia warned that Ukraine's membership in NATO would have "negative consequences for the entire security architecture in Europe."

HOW THE US IS HANDLING THE DIVIDE OVER CLUSTER BOMBS

The beginning of July was the hottest week on record for the planet, according to the World Meteorological Organization, after a series of scorching days saw global temperature records tumble. Climate change and the El Nino weather pattern also drove the warmest June on record. It's the latest in a series of records halfway through a year as temperatures are breaking records both on land and in the oceans.

SEE THE EFFECTS OF CLIMATE CHANGE AROUND THE WORLD

Hundreds of people gathered Monday to mark the five-year anniversary of the dramatic rescue against impossible odds of 12 young footballers from a flooded cave in northern Thailand. Now in their late teens, the boys and their coach, Ekkapol Chantawong, descended into the spotlit chambers of the Tham Luang cave complex to pay tribute to the many people who worked for 18 days and nights to get them out alive.

SEE WHERE THE PLAYERS ARE TODAY AFTER DARING RESCUE

What is the deepest known cave on Earth? When was it discovered?

Monday's answer: Walt Disney was the original voice of Mickey Mouse, making the character's vocal debut in "Steamboat Willie" in 1928.