herman tao, nbc news. >> terrorist threats put southern california airports on alert. u.s. aairport security is stepped up because of isis-related threats calling for attacks on uniformed personnel. l.a.x. upgraded security because of the threats, investigators said there was no specific plot but concerns increased bus of intelligence and monitoring of suspected radicals here in the united states. >>> pain paying to party. one of the exclusive communities is struggling with the air bnb rentals. people have been partying at a house. the last one got so out of hand that police had to break up the mob, now residents want the city to stop the party on these types of rentals. it was not the norm for this quiet neighborhood. hundreds of people partying at a vacant rental house. the party reportedly an 18-year-old's birthday celebration, ballooned to over 250 people mostly teenagers who ran into the streets and flew over fences into neighbor's yards when police arrived. the house neighbors say had become a party pad. >> it wasn't the first time. this was the third weekend in a row