In the back of a siddur, I saw one of the halachot state that one who has not visited the Kotel ("Western Wall" in Jerusalem) within 30 days should tear his clothes when he comes to the Kotel.
Let's say an avel (mourner) can't get a minyan in his home. He goes to the Kotel to pray with a minyan, there. An avel would already be wearing torn clothes during his week of shiva. If he goes to the Kotel would he need to tear again (same shirt, or perhaps wear a different shirt), or is the torn shirt that he is already wearing for his own aveilut sufficient?