Spanish U.N peacekeepers, check a rocket which was set to be fired on a wooden platform , several kilometers north of the Israeli border, near the village of Hebariyeh, southern Lebanon, on Wednesday, Jan. 14, 2009. Hours after the initial morning exchange, three more Grad rockets that were set to be fired were discovered and dismantled by Lebanese troops, security officials said. Israeli forces fired artillery north into Lebanon in response to a rocket attack, the second such border exchange in days which threatened to ignite a second front as Israel battled Hamas in Gaza.