Key Points Iran and the United States are set to hold talks in Geneva on Thursday over Iran's nuclear program. Experts predict reaching a deal will be challenging. As Iran and the US renew negotiations over Iran's nuclear program, a Middle East analyst says the world should be feeling "relatively pessimistic". Fears of military confrontations between the two longtime adversaries have been growing as the US continues a military buildup in the Middle East. Iranian officials say they hold out hope for progress towards a deal to avoid fresh conflict, with Iran and the US expected to hold a third...