My work for 2015 is finished, and I'm taking off the rest of the year to celebrate Christmas and recharge for what promises to be a frenetic 2016. My print columns will continue to run in my absence, and you can find those here .

I'll be back on Monday, Jan. 4. Until then, I wish you and yours a merry Christmas and a prosperous start to the new year!

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Inventor Lonnie Johnson stands with his Super Soaker water guns at JTEC Energy on Wednesday, Oct. 29, 2025, in Atlanta. Johnson, a former NASA engineer, is currently working on a new energy technology through his company’s JTEC device that turns thermal heat into usable energy. (Natrice Miller/AJC)