What explains CNN's obsession with random, bizarre crimes?

And its desire to continually show them to us?

School bus hijacked in Arkansas
See school bus during hijacking

Stenographer rants on House floor

See video of bizarre outburst

 Video shows mall attack by terrorists 3:23

Specificially, do they show it to us because we want to see it?

Or do we want to see it because they show it to us?