U.S. Stocks Slip on Brussels Attacks; Facebook Activates Safety Check

U.S. stocks kicked off Tuesday's session to the downside after tragic terror attacks rocked Brussels. Reports suggest two bombs went off at the Brussels Airport and an additional explosion took place at a subway station, killing at least 31people. European leisure stocks tanked following the news. '[There is] no real risk appetite out there and as the explosions continued and the news stories kept rolling in, it only helped to dent sentiment even further,' said Brenda Kelly, head analyst at London Capital Group. The attacks prompted Facebook (FB) - Get Report to turn on its safety check, which enables people to alert friends and family that they survived the tragedy. TheStreet's Scott Gamm reports from Wall Street.