UN Assistant Secretary-General says 'no proof' Hamas uses construction material for 'military purposes.' UN Assistant Secretary-General Robert Piper claims that there is no proof that Hamas is taking advantage of UN-provided construction material for "military purposes," the pro-Hamas Middle East Monitor reports. He made his remark after Israel announced that it was blocking the transfer of cement into Gaza because Hamas uses it to build terror tunnels. Piper said that the United Nations has provided 1.2 million tons of construction materials to Gaza, though he did not explain why despite that very few reparations have been carried out since 2014's...