NEW YORK (AP) — Live shots are a staple — often ridiculed — of television news that have become more risky in recent years even before a Virginia reporter and cameraman were shot and killed on the morning news on Wednesday. Experts don't expect the live shots' ubiquity to change much, however. "The reason stations do them is because all of their research tells them that viewers respond to live," said Deborah Potter, executive director of the think tank NewsLab. A reporter on scene at a boisterous demonstration or out in a crippling snowstorm is undeniably exciting TV.