Their crunch meeting is set for Friday, the venue will be Alaska, and when they get there Donald Trump and Vladimir Putin will be watching each other like hawks for signs of weakness.

Tensions are on a knife edge with Trump demanding Putin agree to an immediate ceasefire in Ukraine, two U.S. nuclear submarines heading toward Russia, and ominous threats about doomsday weapons emanating from Moscow.

As they encounter each other in person for the first time since 2019, the demeanor of both men will be key as they try to gain the upper hand.

According to body language expert Judi James, who has studied their previous meetings, Trump's most effective weapon could turn out to be humor, which he may use to disarm and belittle Putin.

'Putin seems more than comfortable being on the receiving end of frosty greetings,' she told the Daily Mail.