internet today you probably noticed changes. correspondent claudia cowen reports on an industry protest against new proposed restrictions. >> supports say it's the biggest internet site ever. scores of website going dark, blacking out the names or posting banners to draw attention to sopa, the stop online piracy act. its partner in the senate hi hippa , protext intellectual property act. they are designed to crack down on sites stealing content, be it music or movies made in the u.s. >> we have sites located outside the united states stealing intellectual property, not only from the entertainment business but from millions of others that work in the copyright property of our country. >> bills would require the web company to block sites that share stolen content. mostly offshore operations beyond the easy reach of america's copywrite laws. critics argue crackdown on internet pirates will not be the bill's only effect. >> sopa places tremendous incentives toward anyone who does business with an american