Homeland Security Article Updated: Leave a comment Share on FacebookTweet this! Homeland Security secretary says Dallas gunman acted alone Related Articles You may also be interested in Special reports How Ebola changed the world The most simple human touch - a handshake or a hug - was quickly discouraged.Ebola relies on intimate social interaction to ensure its continued survival - it is passed on through close contact with the bodily fluids of infected individuals.This… To save energy, you should turn off unneeded incandescent and halogen lights To save energy, you should always turn off unneeded incandescent and halogen lights. Only 10 percent of the energy they use goes toward light; the other 90 percent just generates heat.