Manna Jo Greene knows she is not bulletproof, but she is willing to put herself on the line as part of a "human shield" to halt the seemingly unstoppable American-led invasion of Iraq. Within two weeks, Greene hopes to travel from her home near Rosendale to Saddam Hussein's Iraq, the Middle East country in the United States' crosshairs. Organizers hope to get 5,000 volunteers for the effort. "My intention is to prevent the war," Greene said yesterday. "I am willing to do whatever it takes. I intend to live with the Iraqi people and I hope the fact that 5,000...