Did anyone notice wikipedia disappeared?!?

I was on yahoo researching and I typed in wikipedia and on sites talking about wikipedia came up. Soo, yesterday I had typed in boulder colorado population into yahoo, and wikipedia was the second site to be listed. With this in mind I decided to type boulder colorado population again...no wikipedia results showed up. 30 minutes later after researching what this whole wikileaks thing is all about I decide to try again VIOLA wikipedia is back!