Va. preschool's security is more than skin-deep

Lola's Place, a private preschool tucked among the wide lanes and neat lawns of Sterling, Va., boasts a one-of-a-kind security system. The doors are guarded by a vascular recognition system -- a machine that uses infrared light to read a hand's veins, 4 millimeters beneath the skin. Like fingerprints, vein patterns are unique, and the computer installed at Lola's Place will unlock the doors only for individuals it recognizes. Strangers must be buzzed inside by a staff member.

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