Alex Kane: The Latest on the Boston Marathon Bombing:

What we know so far. Senator Dianne Feinstein told reporters that the Saudi National, whose home was searched, in relation to the Boston bombings, is not a suspect. As far as I know, he is not a suspect. That's as far as I know, she said. See this is the problem, we really don't know. We know one thing. It qualifies, in my book, as a terrorist attack. Here is a video of Fox News questioning his roommate. News outlets have confirmed that the man is not a suspect, but has been questioned as a witness. 29 year old Krystle M Campbell of Medford, Mass., has been identified as the second victim. Her father, William A Campbell Jr., told Yahoo News. "She helped everyone, and I am just so shocked right now. We are just devastated. She was a wonderful, wonderful girl. Always willing to lend a hand. In a press conference earlier today, President Obama called the Boston bombing an act of terrorism, but reiterated that investigators do not know the group or individuals responsible, or their motives. The President added: We also know this: The American people refuse to be terrorized, because what the world saw yesterday, in the aftermath of the explosions, were stories of heroism and kindness, and generosity and love. Exhausted runners, who kept running to the nearest hospital to give blood, and those who stayed to tend to the wounded, some tearing off their own clothes to make tourniquets. The first responders who ran into the chaos to save lives. The men and women who are still treating the wounded, at some of the best hospitals in the world, and the medical students who hurried to help saying, when we heard, we all came in. The priests who opened their churches, and administered to the hurt, and the fearful and good people of Boston, who opened their homes to the victims of this attack, and those shaken by it. So if you want to know who we are, what America is, how we respond to evil, that's it: selflessly, compassionately, not afraid. Meanwhile, the Boston Herald has identified the roommate of the man questioned by police in connection with the bombing. The Globe reports: A Revere man today said police informed him his roommate was injured by shrapnel at the Marathon, before searching his apartment, and questioning for hours last night. He is sweet and kind, and a good person, Mohammed Hassan Bada, 20, of Saudi Arabia of his roommate, who he said is a 22 year old also from Saudi Arabia, here to study English in Boston.