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25.05.2026 New claim submitted for Backwards Stair Climbing, 1 Hour 09.05.2026 New claim submitted for Mental Calculation, Division 09.05.2026 New claim submitted for Mental Calculation, Square Roots Keywords: (e.g football beer mat)	Listed below are the verified claims for the record listed. Largest Collection of Military Headgear - Current world record 1. The Wilson History & Research Center in Little Rock, Arkansas, USA has a collection of 5072 different items of military headgear from 87 countries and the United Nations, as of October 2010.     The Book of Alternative records - World records, record breakers and more!