ARK Challenge Readies for Little Rock Expansion; Warwick Sabin to Lead by Mark Carter Posted 1/21/2014 09:37 am Updated 2 years ago Warwick Sabin, executive director of the Arkansas Regional Innovation Hub, will direct the ARK Challenge business accelerator when it expands to Little Rock this year. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 20 days. Purchase Now Already have archive access? Login to view this article.