By Nidal al-Mughrabi GAZA, Oct 14 (Reuters) - U.N. Secretary General Ban Ki-moon lamented the vast destruction in Gaza as he visited the area on Tuesday for the first time since the war, calling the situation "beyond description" and urging a speedy reconstruction effort. He also an**unced that Israel was permitting a first truckload of construction materials to enter the enclave, which has been blockaded by Israel and Egypt since before the conflict. ...