ITANAGAR, Sep 12: The Halo Society has donated four Yamaha scooters to the Vivekananda Kendra Sangathan during the celebration of 40 years of VKVs in Arunachal Pradesh at Nyokum Lapang, Itanagar on Monday. The Halo Society is a registered society of 1997 Class X batch of VKV alumnus, based in Itanagar.