external site in iframe doesn't work on laravel 5.2

I try to display www.google.com an iframe in laravel 5.2, but I just get an empty result.

I already searched for it, but there is no answer on this subject. Thanks

<iframe src="http://google.com" style="position:fixed; left:0; top:0;width:500px;height:500px;"></iframe>

via Chebli Mohamed