WASHINGTON — American and Iranian negotiators have hashed out “guiding principles” for an agreement during the second round of talks on Tehran’s nuclear program, according to Iran Foreign Minister ...

Introduction -- Rocket engine fundamentals -- Nuclear rocket engine cycles -- Interplanetary mission analysis -- Basic nuclear structure and processes -- Neutron flux energy distribution -- Neutron ...

[Bloomberg, 11 July] The USA, China, South Korea, Japan and Russia have agreed on "principles" needed to verify North Korea's list of nuclear materials and programs, according to the chief US envoy, ...