. >> they really do like they've been through a neu tox in. it's not a pretty sight. >> it's human lives the city is looking to save. bug expert say this may be the best shot. >> you can bring down that transmission rate, kill that mosquito population. you can greatly reduce the chances of transmitting this virus to humans. >> the aerial spraying will cost dallas koint $1 million. edward lawrence for cbs news. >>> the drought and heat triggered a record breaking wildfire season. late yesterday the governor of oregon authorized use of national guard helicopters to fight the fires. some residents of washington chased are their homes were allowed to return. the taylor bridge fire destroyed at least 70 homes. was on the verge of consuming this home. firefighters beat back the flames and even though everything was destroyed around it, the house wasn't touched. >>> south african police killing workers at a platinum mine. a warning, some of the video you'll see is graphic. the mine, northwest of johannesburg has been at the center of a violent pay di