by Kerry SHERIDAN Agence France Presse TAMPA, United States (AFP) — NASA is poised to launch Saturday its most advanced space laser ever, ICESat-2, a $1 billion dollar mission to reveal the depths of the Earth’s melting ice as the climate warms. The half-ton satellite, about the size of a smart-car, is scheduled to blast off atop a Delta II rocket on September 15 from Vandenberg Air Force Base in California. The 40-minute launch window […]