Why is TSA producing TWIC cards with a new design and what is the difference between the TWIC and the NexGen card?

TSA first issued the TWIC card in 2007. Over the past decade, the TWIC card’s vulnerability to potential counterfeiting efforts and fraudulent use has increased. The new TWIC NexGen card design uses the latest technology to safeguard your identity and promote the secure use of the credential at regulated facilities or vessels.