Whether there is sufficient strength of evidence to increase recommendations is where scientists disagree.

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We will maintain sufficient strength to prevail if need be, knowing that if we do so we have the best chance of never having to use that strength.

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For example, when Defense Secretary Robert Gates decided to surge production of armored trucks for the Iraq counter-insurgency campaign in 2007, it was discovered there was only one steel plant in the nation producing steel of sufficient strength to meet military needs.

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Another was to balance the foreign judges with a majority of Cambodian judges in the three courts that make up the tribunal (two are needed for appeals) without allowing them sufficient voting strength to block an indictment at the trial level.

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People wishing to use it will need to have sufficient upper-body strength to operate the locking catch and - if using a folding wheelchair - be able to unfold it and transfer in and out of their vehicle.

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