Fear does not make a team careful, it makes them quiet. If telling you about a problem reliably produces an outburst, people learn to wait, hope it resolves itself, and let you find out when it is far too large to fix cheaply. You end up with a group that looks smooth and is hiding everything. The information you most need is the information your reaction is pricing out.

Watch what you do in the first five seconds of hearing bad news. Thank the person for bringing it before you deal with the thing itself.