Leonard Pitts: Why, when we see black people, do we so often see what isn’t there?

The beam from his flashlight reflects off the glass, so we can't see what he saw.But in a sense, we don't need to see what Fort Worth police officer Aaron Dean saw to know what he saw, peering through that window. He saw something fearsome, a threat to life and limb. All this in the person of Atatiana Jefferson, a 28-year-old black woman, who was actually doing nothing more sinister than playing video games in her bedroom with her 8-year-old nephew.It was 2:25 Saturday morning. Police had been c