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) damp-proof course in order to protect against rising damp: Henry Burdett was deeply concerned with the quality building in Victorian England, and he cautioned would-be house buyers to check houses for the presence of a damp-proof course and to ensure that it is of an effective type. As an example of poor workmanship leading to an ineffective damp proof course, Burdett cites the following example: Rising damp is a phenomenon that is fully predicted by the laws of physics, has been researched on a worldwide scale, and has been documented since Roman times. Nevertheless, a small number of people have