Walmart already offers in-store pick up and just expanded its test of a locker system where shoppers can order online and pick-up in the store without waiting in line.

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Top of his mind, though, is this week's Lloyds TSB Tri-Series in Aberdeen against Ireland and New Zealand, one which the hosts are viewing as an opportunity to pick up their first-ever victory over a Test playing nation.

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"I thought some of the execution today was excellent, " said McGeechan, who insists he will not pick the Test XV until after Tuesday's final warm-up against Southern Kings in Port Elizabeth.

BBC: McGeechan praises Lions character

But O'Driscoll told the BBC's Sport Wales programme that Jones is the pick of the Welshmen he has played against during his 11-year Test career.

BBC: Centurion Brian O'Driscoll hails Wales' Stephen Jones

Seventeen questions, a full one-third of the test, mine for the trait, challenging applicants to pick the shape that best fits into a complex pattern.

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In reality, the scans are more likely to pick up "incidentalomas"--blips that don't necessarily mean anything but require a follow-up test, says Dr. Roseanne Leipzig, professor of clinical and geriatric medicine at Mount Sinai School of Medicine.

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The nuclear test monitors pick up "infrasound", or low frequency, waves from about 20 meteors a year -- "if conditions are right, perhaps as small as a pea, " she said.

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