AngularJS need to set default in drop down select

I have the following select in my HTML

<select ng-model="atcStatusTaskList" ng-options="s.name for s in statusTaskList"></select>

It is filled with this in the controller

   $scope.statusTaskList = [
        { name: 'Open', value: '1' },
        { name: 'In Progress', value: '2' },
        { name: 'Complete', value: '3' },
        { name: 'Deleted', value: '4' },
    ];

When it fills up the select there is a blank, I want it to default to 'Open'.  

I also need to fill it later when the value changes ie 1,2,3,4