This week, we talk about why some people say "pin" and "pen" the same way, why citizens of the United States call themselves "Americans" when other people live on the American continent too, and why flags can be flown at half-mast or half-staff.  FOLLOW ALONG ON THE WEBSITE The Pin/Pen Merger http://bit.ly/pin-pen-merger 'American' http://bit.ly/demonyms 'Half-Staff' and 'Half-Mast' http://bit.ly/half-mast-staff FOLLOW GRAMMAR GIRL Twitter: http://twitter.com/grammargirl Facebook: http://facebook.com/grammargirl Pinterest: http://pinterest.com/realgrammargirl Instagram: http://instagram.com/thegrammargirl LinkedIn: https://www.linkedin.com/company/grammar-girl GRAMMAR POP iOS GAME Optimized for iPad: http://bit.ly/GrammarPopiPad For iPad and iPhone: http://bit.ly/GrammarPop GRAMMAR GIRL BOOKS http://www.quickanddirtytips.com/grammar-girl-book-page