Hewlett-Packard is investigating a claim that Webcams built into its PCs are incapable of tracking the facial movements of black individuals and only function properly when Caucasians or people of other lighter-skinned races are in the frame. The probe was prompted by a YouTube video in which a black man named Desi demonstrates the problem. The camera, which is designed to follow individuals' head movements, fails to track Desi as he moves in and out of the picture. But when Desi's white co-worker, Wanda, enters the scene the camera follows her. "As soon as my blackness enters the frame, it...