Hawkeye: Exactly. There are no innocent bystanders in Hell. War is chock full of them-little kids, cripples, old ladies. In fact, except for some of the brass, almost everybody involved is an innocent bystander.
Chain Reaction is a 1996 American action film directed by Andrew Davis, starring Keanu Reeves, Morgan Freeman, Rachel Weisz, Fred Ward, Kevin Dunn and Brian Cox.
The blonde woman is played by Carrie Wiita, and the brunette is Cali Fredrichs. Thanks to Who is that hot ad girl? for the linkage. As for the actors, the guy who suggests hiding behind the chainsaws is Creagen Dow, the one who advocates the attic is Aaron Jennings, and the chainsaw killer is played by David Figlioli.