Achieving that longer lead time requires blocking Iran's four routes to nuclear weapons: through its Natanz and Fordow uranium enrichment facilities, where thousands of centrifuges separate uranium isotopes; through plutonium production at the Arak heavy water reactor, which Iran says is needed to produce medical radioisotopes; and by way of a covert path involving undisclosed facilities.
With the second path, covert action, it is harder to quantify Obama's position as it is of course covert.
By adding to the significant technological challenge proliferant states must overcome to develop multi-stage missile systems, these external controls force such states to use covert or less efficient paths of development, increasing the cost and time requirements for system development.
That mistake leads us down the path to covert leadership or group ineffectiveness.
We present and analyze affiliation networks representing common covert organizational forms: star, path and semi-complete hypergraphs.
Similarly, under covert scanning, the scan path neglects the left hemifield when the parietal module is lesioned but not when it is intact, as shown in figure 4 c and d.
They don't blindfold you, but once the northerly route leaves the road to Fence Lake, it veers and crosses so many gate-protected dirt paths that only a covert operative could find his way back.
Hastings and other journalists have pointed out that his career path — through Special Forces and the covert operations they oversee — was riskier than the route forged by most general officers.
Sam's own career path is thwarted by the covert racism of the British.
The structure for the story is linear without any branching paths for alternate storylines, though there are optional covert missions which can further flesh out the story.
Path (2) proposes investigation of children's input with an eye to finding covert sources of negative evidence.
