"We are constantly emphasizing to people that they need to address anything that affects flight safety or mission success, many pathways to do that, and we need to understand better what might be preventing people from using those pathways."

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Traditional horizontal search engines cannot always identify the target audience, niche or vertical industry of a page or site. Vertical search engines address this issue by the nature of their design. They identify sites according to more specific criteria and sometimes even by human input.

— Marc Ostrofsky