Sorry about that, I didn’t see your reply.
It would actually be better to add that image as a Background image in your CSS rather than an inline image. If you make it a background image in your css, then it will adjust to your browser size and there should be no white space.
Do a search for .slider-wide
in your css file and add it like this –
.slider-wide {
background: url(http://www.talkingapemedia.com/wp-content/uploads/2015/09/TAM-Homepage-Photo-0001-2280pixels-cropped.jpg);
clear: both;
width: 100%;
}