February 9, 2012 10:08 pm Not All Wi-Fi Is Protected Those using wi-fi, especially in airports where it’s free, should be very careful. Personal information could be exposed. US & World Videos 2:48 Forecast: Gradual warming trend 1:25 Bay Area high school seniors honored with Dave Goldberg Scholarship 1:10 Bay Area app monitors problems for people living with Parkinson's 0:26 Kaiser Permanente data breach may have affected millions 1:35 Kari's forecast: Gradual warming trend