The issue focused on whether the United States and Europe have taken enough steps to curb Iran's nuclear program, a major threat to global energy security.

The issue focused on whether the United States and Europe have taken enough steps to curb Iran's nuclear program, a major threat to global energy security. Photo: Associated Press

The United States and European governments have been working hard to prevent Iran from developing nuclear weapons since at least 2005 and in the aftermath of Iran's 2010 test-firings of a plutonium