#announcement_modal .modal-dialog{
    position: relative;
    display: table;
    overflow-y: auto;    
    overflow-x: auto;
    width: auto;
    min-width: 300px;   
}

@media only screen {
	#announcement_modal .modal-body img{
		max-width: 100%;
		height: auto;
		display: block;
	}
}

@media (min-width: 768px) {
	#announcement_modal .modal-body img{
		max-width: 600px;
	}
}