Start off with this image ...
Now go to CNN and the lead story is:
Deadly quake hits Italy
On Fox News it is about a man in Pakistan who helped the US get Usama bin Laden and yet President Obama will not help him as he faces 33 years in prison!
I've noticed Fox never misses a chance to slam the President. Well, this President anyway. Interesting how the news varies by network!
On MSNBC, the lead story is about the potential danger to Mitt Romney of hanging out with Donald Trump.
Yes, there is bias in the news. And most often it is what stories they choose to focus on and how they are packaged.
And on BBC, it is about Syria. So if you want to learn about the rest of the world, that is your source.