Brussels, 12/04/2012 (Agence Europe) - The Middle East Quartet called on Wednesday 11 March for the international community to guarantee that the $1.1 billion promised in aid is paid to support the Palestinian Authority's “important institution-building efforts”. United Nations General Secretary Ban Ki-moon, EU High Representative Catherine Ashton, United States Secretary of State Hillary Clinton and Russian Foreign Minister Sergei Lavrov encouraged the Authority to continue its work....