I'm having trouble vertically centering both my text id="WhatIsMasterRow" and image id="WhatIsMasterPhoto. I've tried wrapping it in a .container and using the bootstrap center-block, as well as some other centering classes. 
<!DOCTYPE html>
<html lang="en">    
<body>
    <!-- What is Master Page -->
    <div class="row" id="WhatIsMasterRow">
        <div class="col-md-6" id="WhatIsMasterText">
            <div class="row-text", id="SubHeaderTextLeft"> What is a Master? </div>
            <div class="row-text", id="RegularTextLeft"> Test Text  </div>
        </div>
        <div class="col-md-2 col-md-offset-2 center-text">
            <img id="WhatIsMasterPhoto" src="Resources/Images/Peter-Limmer-boots-2.jpg">
        </div>
    </div>
</body>
I've tried using margin: 0 auto; as well, but it's not working.
.col-md-2 {
    margin: 0 auto;
    background-color: black;
}
 
    