Will Isis attack America?

Isis just released a video shortly after the attacks on Paris saying, the United States will suffer a similar day Paris did, meaning they are going to attack the heart of the United States. The heart meaning, Washington DC. The United States of America's capital. Is this true? I can't really say if they are going to attack the U.S.A or not. Hacker Group Anonymous says they will attack. Since they have threatened the U.S.A Washington DC has beefed up security waiting for any kind of threat. Nothing yet has happened. In other news, Hacker Group Anonymous has claimed they have taken down thousands of Isis Twitter Accounts. In my opinion, I think they did the right thing.