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2. CG634 - Wikipedia

   en.wikipedia.org/wiki/CG634

   The mount consists of a green metal bracket that hooks over the front of the helmet and the mount, which is screwed into it. There is a strap that loops through the mount and connects to a large ring, which is usually on the top of the helmet, and two more straps secure the mount to the back of the helmet. [ 1 ]

3. Personnel Armor System for Ground Troops - Wikipedia

   en.wikipedia.org/wiki/Personnel_Armor_System_for...

   Personnel Armor System for Ground Troops (PASGT, pronounced / ˈ p æ z ɡ ə t / PAZ-gət) is a combat helmet and ballistic vest that was used by the United States military from the early 1980s until the early or mid-2000s, when the helmet and vest were succeeded by the Lightweight Helmet (LWH), Modular Integrated Communications Helmet (MICH), and Interceptor body armor (IBA) respectively.

4. Riot protection helmet - Wikipedia

   en.wikipedia.org/wiki/Riot_protection_helmet

   The simplest form is a hard shell with reinforced padding, and a chinstrap and a hinge-up (usually polycarbonate) visor, as in this image. These riot protection helmet visors are usually curved sideways and straight up-and-down, not curved both ways like on the older type of motorcycle helmet. One accessory is a back-of-the-neck protector.

5. Motorcycle helmet - Wikipedia

   en.wikipedia.org/wiki/Motorcycle_helmet

   A 2008 systematic study showed that helmets reduce the risk of head injury by around 69% and the risk of death by around 42%. [10]Although it was once speculated that wearing a motorcycle helmet increased neck and spinal injuries in a crash, recent evidence has shown the opposite to be the case: helmets protect against cervical spine injury.

6. Scientists track changes at the Yellowstone supervolcano ...

   www.aol.com/scientists-track-changes-yellowstone...

   It’s known as a super-eruption because it released an estimated 250 cubic miles of material – 1,000 times larger than the Mount St. Helens eruption in Washington state in 1980.

7. Visor - Wikipedia

   en.wikipedia.org/wiki/Visor

   Nowadays many visors are transparent, but before strong transparent substances such as polycarbonate were invented, visors were opaque like a mask. The part of a helmet in a suit of armor that protects the eyes. A type of headgear consisting only of a visor and a band as a way to fasten it around the head. Any such vertical surface on any hat ...