Iran's nuclear program has been at the heart of tensions between the US and the Islamic Republic for more than two decades. Washington has said Tehran is working toward developing nuclear weapons , something it wants to prevent at all costs. Iran has denied seeking the bomb, but insists on its right to a civilian nuclear program.

US President Donald Trump has said stopping Iran from acquiring a nuclear weapon was a key reason behind the US decision to, together with Israel attack Iran on February 28 . A ceasefire is now in place, and negotiations between the two sides could soon resume.

Back to 2015?

More than 10 years ago, Washington and Tehran reached a landmark compromise. The 2015 nuclear agreement, officially known as the Joint Comprehensive Plan of Action (JCPOA), was designed to curb Iran's nuclear program in exchange for sanctions relief.…