Nightly Brief

Top CNS stories for today including Attorney General Jeff Sessions offered the House Judiciary Committee little insight Tuesday about a meeting with the Trump campaign adviser who was in contact with Russian officials and lied to the FBI about it; Republican House Speaker Paul Ryan on Tuesday called for embattled U.S. Senate candidate Roy Moore of Alabama to drop out of the special-election race; new research suggests artificially cooling the planet by mimicking the effects of volcanic eruptions may do more harm than good in combating climate change, and more.