NEW YORK - A Pakistani man went on trial Wednesday on charges alleging he agreed to help an al-Qaida operative planning a chemical attack against Americans sneak into the United States. Uzair Paracha, 25, is accused of agreeing to support the plot during meetings with two al-Qaida operatives and his father, a businessman held at Guantanamo Bay. "This trial is about the defendant's role in helping al-Qaida penetrate this country and attack the United States from within its own borders," Assistant U.S. Attorney Eric Bruce said in his opening statement. Bruce said Paracha was trying to help Majid Khan, an...