public function beginRollbackWindow() {
		$this->Status = 'Started';
		if (!$this->Started) $this->Started = SS_Datetime::now()->Rfc2822();
		$this->log(_t('EmergencyRollbackStep.BEGINROLLBACKWINDOW',
			"{$this->Title} is beginning a rollback window..."));
		$this->write();
		// Message author that the deployment is complete
		$this->Pipeline()->sendMessage(Pipeline::ALERT_SUCCESS);
		return true;
	}