How I can remove the edges, or enhance my header image to cover the left, top and right.
Project link on CodePen: http://codepen.io/ArizonaWarriorOne/pen/mJjBQM
.masthead-heading,
.masthead-intro {
  text-align: center;
}
.masthead {
  padding: 10em 0;
}
.masthead-intro {
  margin-bottom: 0.1em;
}
.masthead-heading {
  margin-top: 1.2em;
}
.masthead {
  background-image: url('http://jmdarter.com/wp-content/uploads/2012/11/Sonoran-Sunset-Flare.jpg');
  background-size: cover;
  border-top: 2em solid #FF6600;
  background-position: center;
 }
<header class="masthead">
  <p class="masthead-intro">Hi, I'm</p>
  <h1 class="masthead-heading">Tim</h1>
    
  </header>
<section>
</section>
<section>
</section>
<section>
</section>
<footer>
</footer>