And facebook said it was under an alias. She and her husband syed farook killed 14 people at a Holiday People where he worked. Farooks sister fears backlash towards the muslim community. I just want to say that not all of us are like this. You know . Were not all, you know, terrorists. Weve also learned tonight farooks brother is a u. S. Navy veteran who earned medals for fighting global terrorism, served from 2003 to 2007. Police say there is no known threat here in philadelphia but the city is working with the fbi to make sure it is safe. Nbc 10s andrea kleinthomas live in center city tonight. I know you spoke with the Police Commissioner tonight. What did he have to say . Reporter commissioner ramsey said that philadelphia on high alert since paris attacks and San Bernardino is another example of the potential dangers. Now, tonight, he and a local security expert tell me whens happening behind the scenes to keep us safe. Terrorism is here. In the united states. Reporter every day th