Iran's top nuclear scientist has been killed, and Iran is blaming Israel for the situation. Many questions about the nuclear program remain.

'Assassinating nuclear scientists is the most violent confrontation to prevent us from reaching modern science.'

The Wall Street Journal reported the Iranian regime has been stockpiling nuclear material far in excess of what's allowed under the deal.

President Trump in 2018 withdrew the US from the Obama administration's Iran nuclear deal, calling it 'the worst deal ever' and a 'disaster.'

North Korea displayed its nuclear arsenal in a military parade commemorating the 75th anniversary of the ruling party.

Israeli Prime Minister Benjamin Netanyahu accused the Islamic militant group Hezbollah of storing explosives in Beirut.

'Iran and North Korea have resumed cooperation on a long-range missile project, including the transfer of critical parts,' an official said.

The Pentagon reported that China is planning to double the size of its nuclear stockpile within the next 10 years.

'It would be an invitation for other nuclear-armed countries to follow suit,' the Arms Control Association's executive director said.

The concerns stem from a high level of activity at China's Lop Nur nuclear weapons test site in 2019.