Largest welding lesson

According to Official Guinness Records,

The largest welding lesson consists of 275 participants, achieved by Three Fires Council and Boy Scouts of America (both USA) in Willowbrook, Illinois, USA on 11 April 2015.The lesson was attempted in order to help scouts from various groups to achieve their welding merit badge.

For a complete list of 2015 records, please visit 2015 Guinness Records in United States.

Related Images

Other United States records that might interest you:

• Largest collection of Batman memorabilia
• The highest score in Score Mode on Rubik's Puzzle Galaxy: RUSH (Nintendo WiiWare)
• Most perfect games of Wii Sports Bowling
• Fastest genetic diagnosis
• Most viewed fan film based on a fighting videogame
• Largest arcade machine
• Largest collection of Swamp Thing memorabilia
• Highest throw of a playing card
• Largest origami butterfly
• Most concrete blocks broken consecutively whilst holding a raw egg
• Most people wearing Cat in the Hat hats
• Largest high intensity interval training in 24 hours (multiple venues)
• Oldest comic book artist
• Largest simultaneous yodel