OPEC siege members of OPEC were taken hostage in Vienna, Austria, where the ministers were attending a meeting at the OPEC headquarters at Dr-Karl-Lueger-Ring 10 (renamed Universitätsring in 2012). The hostage attack was orchestrated by a six-person team led by Venezuelan terrorist Carlos the Jackal (which included Gabriele Kröcher-Tiedemann, Hans-Joachim Klein and Anis al-Naqqash). The self-named "Arm of the Arab Revolution" group called for the liberation of Palestine. Carlos planned to take over the conference by force and kidnap all eleven oil ministers in attendance and hold them for ransom, with the exception of Ahmed Zaki Yamani and Iran's Jamshid Amuzegar, who
Damp (structural) liquid products these are based on silane/siloxane active ingredients which line the pores of the mortar to repel damp. The effectiveness of liquid and cream based rising damp treatments varies considerably between products due to variations in product formulations. Independent test certifications such as British Board of Agreement (BBA) certificates are available for some products, showing that they have met a minimum requirement for product performance. Damp-proofing rods use similar active ingredients to those found in liquid or cream-based rising damp treatments, but contained in a solid rod. They are generally considered to be easier to use than other types