Wikipedia and many others are protesting bills under consideration before the US Congress.
Right now, Wikipedia blackened out their pages with this:
These bills if they become the law in the US would have serious implications to the modern communication everywhere in general and would have a big impact on the photo sharing sites.Imagine a World
Without Free Knowledge
For over a decade, we have spent millions of hours building the largest encyclopedia in human history. Right now, the U.S. Congress is considering legislation that could fatally damage the free and open Internet. For 24 hours, to raise awareness, we are blacking out Wikipedia.