Science March 24, 2017 10:59 am First of Three Spacewalks Underway at ISS Two astronauts left the International Space Station on Friday to prepare the orbiting laboratory for the arrival of commercial space taxis and to tackle some maintenance. US & World Videos 0:54 Nude cruise sailing out of Miami in 2025 1:36 Arizona Senate repeals 1864 abortion ban 1:40 Democrats say Big Oil misled public for decades about climate change 1:01 Woman arrested on human trafficking and prostitution charges in Miami-Dade in court 1:45 NYPD enters Columbia University in riot gear to clear protest