How should we make sense of Nigeria's 21st century identity? Newly anointed as Africa's number one economy, it is an oil-rich emerging power. It is also beset by corruption, poor governance and a wave of internal conflict that could threaten the very unity of the state. HARDtalk speaks to the highly acclaimed Nigerian novelist Chimamanda Ngozi Adichie. Her fiction explores her country's troubled past and current challenges. How does this writer see Nigeria's story unfolding?