New Delhi, Nov 23 (ANI): Nobel peace laureate Kailash Satyarthi urged United Nations to prioritize abolition of child slavery while addressing a candle light march in New Delhi. Satyarthi, 60, whose non-government organisation (NGO) Bachpan Bachao Andolan (BBA) has been credited with freeing over 80,000 child labourers in India over 30 years, said it was unbelievable that slavery was still so prevalent. Satyarthi also said they started a petition campaign and are expecting at least five and a half million petitions to be sent to the UN.