TED Talks
Ted: Ted Ed: Chlorine: Periodic Table of Videos
The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about chlorine - element number 17, an extremely reactive and dangerous gas, which was used as a weapon in World War I. [8:41]
Curated OER
Home Sweet Home Front 'V2 Rocket' Click on Image to Enlarge!
This site has a description of the two main vengeance weapons used by the Germans during World War 2: The V-1 and V-2 rockets.