The magazine solicited reactions from Alan Weisman, author of "The World Without Us", virologist W. Ian Lipkin, MD, and Michel Bruneau, PhD, comparing their predictions with the film's depictions. The article raised the most questions regarding the virus' mutation and the medical results, and pointed out that a suspension bridge like the Brooklyn Bridge would likely completely collapse rather than losing only its middle span. Neville's method of producing power using gasoline-powered generators seemed the most credible: "This part of the tale is possible, if not entirely likely," "Popular Mechanics" editor Roy Berendsohn says.