Delhi Metro's Magenta Line from Janakpuri West to Noida's Botanical Garden became fully operational on Tuesday after CM Arvind Kejriwal flagged off the 24.8-km Kalkaji Mandir-Janakpuri West section. The line will provide metro connectivity to IGI airport's domestic terminal and will reduce the travel time between Noida and Gurugram from nearly 1.5 hours to 50 minutes.