This market resolves YES if there is footage of Trump and Biden shaking hands at 

This market is intended to be about the scheduled CNN debate on June 27th, but would also include if that debate were rescheduled or cancelled or cancelled and replaced with another debate, so long as it happens in June 2024.

If they do not shake hands on the day of their debate, or if there is no debate in June, this market resolves NO. This market will be scheduled to close just before the debate, and will resolve the day after.

A handshake is a globally widespread, brief greeting or parting tradition in which two people grasp one of each other's hands, and in most cases, it is accompanied by a brief up-and-down movement of the grasped hands.