By Nidal al-Mughrabi Gaza (Reuters) - Israel opened the border to the first truckloads of Building materials for post-war reconstruction in Gaza on Tuesday and U.N. Secretary General Ban Ki-moon called the destruction in the Palestinian enclave "beyond description". Gaza was blockaded by Israel and Egypt for years before the most recent conflict, which ended in August after two months, because, they said, militants were using materials to build fortifications and tunnels under the border. ...