Relatives of two young men who were lured away by Islamic radicals plan to tell a House committee Thursday that Muslim leaders in America "brainwashed" and "manipulated" their family members, and that "political fear" is preventing people from talking about Islamic extremism. The witnesses are part of the panel Rep. Peter King, R-N.Y., plans to call at a controversial hearing on the threat posed by radical Islam in the United States. King, chairman of the House Homeland Security Committee, has faced persistent and vocal criticism from groups and lawmakers who claim he is unfairly targeting one ethnic group. One Muslim...