title: Bootstrap 100%-height page with a responsive news section
body: <p>I'm creating a 100%-width/100%-height (no scrollbars) website with Bootstrap and I want to make a news section (just like an iframe). Width: OK. The problem is that I can't make the height responsive. I want the news section's height to change, so I dont get "blank spaces" in bigger screens or scrollbars in smaller ones. (I'd like a 80%-height iframe).</p>
  
  <p>Any hints? This is how I wanted to look like: </p>
  
  <p><img src="https://i.stack.imgur.com/47VQO.jpg" alt="enter image description here"></p>