We need to unite America’s “grassroots” with its “grasstops” — to awaken a broad climate change voting majority that not only includes young people with passion, but businesses, the military, labor, farmers, energy providers, and subject matter experts alike. Only by linking these disparate groups — then broadening the coalition even further to include global leaders and citizens everywhere — can we galvanize action, command accountability, and unleash a clean energy transformation that will mitigate climate change and assure economic progress at the same time.

Calling it a “great embarrassment” that fails to “halt Iran’s nuclear ambitions,” President Trump today announced his intention to pull out of the Joint Comprehensive Plan of Action and re-impose sanctions on Iran. The independent nuclear, national security, and regional experts of Harvard Kennedy School’s Belfer Center for Science and International Affairs have been assessing the terms of the JCPOA for years. In the wake of Trump’s decision, many of them weighed in with thoughts on the significance of Washington’s policy change – and what comes next.

President Trump has a major deadline for the Iran nuclear agreement looming just 10 days away. What could happen if the president decides to withdraw? Judy Woodruff discusses potential consequences with former Energy Secretary Ernest Moniz, a key member of the American negotiating team that struck the deal, plus a response to charges laid out by Prime Minister Benjamin Netanyahu.

Ronald Reagan invoked the Russian proverb “trust, but verify” when negotiating nuclear disarmament with the Soviet Union, but in recent negotiations with Iran and upcoming talks with North Korea, our North Star was and must be “don’t trust, and verify, verify, verify.”

The world has crossed over to a new nuclear era, where a fateful error -- rather than intentional aggression -- is the most likely catalyst to nuclear catastrophe.

CSIS hosted Ernest J. Moniz, the co-chair and CEO of NTI and former U.S. Secretary of Energy, for a discussion in which he addressed the increased risk of nuclear miscalculation against the backdrop of today’s rapidly evolving global security threats, the need to rethink outdated nuclear deterrence postures, and the imperative to prevent nuclear proliferations and develop new fuel-cycle policy solutions. Moniz also discussed the future of the Iran nuclear agreement and the current crisis with North Korea. His remarks were followed by a discussion with John Hamre, president and CEO of CSIS.

From sharply rising tensions with a nuclear North Korea and decertification of the Iran nuclear deal to China’s growing global assertiveness and the State Department pullback from projecting American values, such as democracy and human rights, around the world, the United States faces urgent national security challenges.

In a panel discussion Monday evening at Harvard Kennedy School (HKS) moderated by MSNBC host Rachel Maddow, former members of President Obama’s cabinet described what they see as a fraying of alliances, a loss of credibility with allies and enemies, a stepping back as a leader on human rights and democracy, and a relinquishment of diplomacy as a critical component of national security.