http://www.rediff.com/tags/+ukrainian+jan+koum India's largest news and entertainment service online.. en-us Sat, 04 May 24 05:41:23 +0000 Sat, 04 May 24 05:41:23 +0000 http://www.rediff.com/push Rediff feeds Copyright: (C) 2009 Rediff.com India Limited. All Rights Reserved. http://www.rediff.com/money/report/tech-whatsapp-crosses-half-a-billion-user-mark/20140423.htm Sat, 04 May 2024 11:11:23 +0530