Tatami (Japanese armour) the other related parts of a full suit of Japanese armour. Collapsible head protection such as "" and other collapsible armor are also "tatami" armor; a traditional kabuto could also be part of a tatami gusoku. Tatami armour was lightweight, portable, convenient for transportation, and they were manufactured inexpensively for the ashigaru light infantry. Tatami armours were worn by all samurai classes from the highest class to the lowest class. The higher class samurai wore elaborate armour while the lower class samurai and retainers wore simpler versions. In his book "Arms and Armor of the Samurai: The History of Weaponry
Body worn video enforcement's use of body-worn cameras found that incidents where police used force and formal misconduct complaints decreased significantly; scholars of crime were unsure to what extent body-worn cameras played a role in the decline, but noted that the results were consistent with trends in other cities were cameras have been introduced. Howard M. Wasserman has identified several other limitations. Adopting body worn video can have unintended outcomes. In particular, increased transparency can create over-deterrence: when officers know they are being recorded, they will only do the minimum required. Another limitation is the video evidence. Video doesn’t always ‘speak for itself’