Old Hearing Aid

The title is a joke, I know it's not a hearing aid, but I think it is some sort of a device used to register faint distant sounds and signals. Even though, the build doesn't seem like it's able to have a very long reach.

Researcher trying to pick up distant sounds and signals.
I really don't have any information on this contraption, if you happen to know anything more about it, feel free to post it in the comments section and I'll edit the article accordingly.

Update: This seems to be equipment used to listen to distant sounds of incoming aircraft before the radar was made. 

Nazi Rally

Adolf Hitler had a dramatic and lengthy rise to power filled with different events, after his WW1 political involvement up to the failed beer hall putsch, night of the long knives and beyond. When the Nazi party established themselves, they had to work more on their propaganda and one of the key elements of it were the Nuremberg Rallies. The key goal these meet ups had was to strengthen the Nazi Party image and the cult of personality for Adolf Hitler who was always presented as the savior of the German people.

Members of the NSDAP saluting at their meeting.
The Nazi meet-up on the picture is either from Nuremberg or just any other larger party meeting. The Nuremberg Rally was used for the main propaganda purpose of the party ever since 1923 up to 1939 which was never held because of the German offensive on Poland. Nuremberg was chosen as the rally point / location because it was in the center of Germany and it was well equipped for such large propaganda events.

Vietnam Battlefield

The most famous open military conflict during the Cold War. It started off and had its roots as the fight of the Vietnamese people against the French colonial interests, but was really a fight between communists and anti-communists. The conflict lasted almost 20 years and had taken a great toll, both on the military, civilian population and the relationships between different countries which were already strained in that era.

US Soldiers held up on a hill with supplies observing a distant battlefield and destruction.
The main characteristic, in my opinion, of the Vietnam war was the presence of cameras and war journalists. Such high presence of witnesses and press was eye opening to the public which eventually lead to protests and pressure build up to end the war and cease hostile activities. The Vietnam war and cult movies related to it (such as "Apocalypse Now" or "The Deer Hunter") had a lengthy and determined effect on the general public world wide, and that is that war is a very dreadful, bad, painful and miserable experience.