Russia-linked hackers hijacked a satellite to beam its Victory Day parade into Ukraine, while U.S. officials warn of nuclear ...

Nuclear fusion – the process by which atomic nuclei are combined into heavier elements to generate energy – has the potential ...

The "Zapad-2025" joint military exercise is expected to involve Russia-made hypersonic missiles and the simulated use of ...

Although Israel's Iron Dome has been a success against its regional enemies, Trump's Golden Dome is a thoughtless copy with ...

The final pillar of a once-robust set of arms control treaties between the U.S. and Russia expires in six months.

In an ever more dangerous world the focus should be on how we can limit, not increase, the risk of major nuclear conflicts.

Top Iranian security official signals it may resume nuclear negotiations if the U.S. abandons military options.

Russian President Vladimir Putin said on the eve of a summit with U.S. President Donald Trump that their countries might ...

By Mark Trevelyan LONDON (Reuters) -Russian President Vladimir Putin said on the eve of a summit with U.S. Donald Trump that ...

The Kremlin has tried to calm tensions in a feud between Trump and Medvedev that spiraled into nuclear threats.