Mohsen Fakhrizadeh is latest, and most prominent, of numerous leading researchers assassinated over past decade, in remarkably similar attacks Iran has ascribed to US and Israel

US reportedly determined in 2007 that the scientist's job as a lecturer was a cover for his role spearheading Tehran's illicit nuclear weapons development

Kim Jong UN warns he will marshal full nuclear force if Pyongyang is threatened as never-before-seen weapons unveiled at event marking 75 years in power for ruling party

Mayor of Japanese city bombed by US at end of World War II raises concern that nuclear states have retreated from disarmament efforts

At scaled-down ceremony due to coronavirus pandemic, survivors call on Japan, international community to increase efforts to eliminate nuclear weapons

Echoing criticism Paris made of Tehran after February satellite launch, Iranian foreign ministry says missile test incompatible with French disarmament commitments

Fox News cites report by Baden-Württemberg spy agency saying Iran, other states are seeking to 'complete existing arsenals... and develop new weapon systems'

Red Cross survey of 16,000 young people finds most expect nuclear war in coming decade; 77% of Israelis oppose any use of atomic weapons, 82% back warfare restrictions

Comments come after Pyongyang gave US New Year's deadline to offer fresh concessions amid stalled negotiations

Avangard hypersonic glide vehicle can travel 27 times the speed of sound and zig-zag through atmosphere en route to target, making it almost impossible to intercept