A programmable LED pumpkin at hacker space HacDC, in Washington, D.C., designed by member David Kaufman. Many Halloween purists prefer to design, rather than buy, high-tech ghouls, goblins and ghosts.
Jacob Fenston for NPR
Facebook CEO Mark Zuckerberg at Facebook headquarters in Palo Alto, Calif., on Oct. 5. Facebook said it was working to fix the privacy problem reported by The Wall Street Journal.