I think this article is and should be of interest to more people.
"Providing a conceptual terrorist attack using a laser system, the FBI said that a small lightweight laser system could be hidden indoors or outside with relative ease until and during the time of an attack.
“For example, a terrorist/criminal could be perched on an elevated platform and target pedestrians below at will… Of greater concern would be a laser system used to target drivers hauling hazardous materials or fuel tankers,“ said the FBI, which estimated that such a weapons system could be put together for about US$50,000. "