Lin Evola-Smidt turns weapons into art – on an increasingly ambitious scale.
But many exiting lawmakers also bring years of experience to the Obama administration.
Readers write about religious music at schools during the holidays, reducing human population growth to improve the health of the planet, and monitoring teens' use of the Internet.
Cheaper gas, bad economy have hybrid-car makers, energy auditors scrambling.
Buildings gobble up 40 percent of America's energy. A new tool allows people watch their power diets.