text: Suicide Bomber Kills Two in Jerusalem JERUSALEM - A missile from an Israeli helicopter wounded 12 in a Palestinian refugee camp in Gaza early Thursday after a teenager from the West Bank evaded roadblocks and blew herself up next to a busy Jerusalem bus stop, killing two policemen.    To carry out the Wednesday suicide attack - the first in Jerusalem in seven months but the second in Israel in three weeks - the 19-year-old overcame a strict military closure of the West Bank imposed for a series of Jewish holidays that began last week...