the police fired 70 rounds hitting guerena 22 times. he never fired a shot. while the botched raids could be isolated incidents, those sounding the alarm say the rise of military-style tactics is changing police culture. >> if you dress a guy like a soldier and you give him a soldier's weapons and you train him like a solider and you send him out in the streets and you tell him he's fighting a war yea i absolutely think that has an effect on mentality. >> meanwhile, the trend is being fueled by commercial interests outfitting swat teams is now a multi-million dollar business thanks to homeland security grants that flooded police departments post-9/11. here at the urban shield event private companies display their latest wares. >> welcome to urban shield. we have the watch. >> dhs grants totaling more than 34 billion dollars have been transferred to local police agencies. >> the federal government has provided so much money they've created this military industrial complex for local police... for counterterrorism, for drug war. >> really reminds me of the vehic