NASA astronaut Don Pettit to discuss his seven-month space mission on April 28; check live streaming details, time and how you can participate

Astronaut Don Pettit will host a live conference on April 28 to discuss his 220-day mission on the International Space Station (ISS), where he conducted vital research, including 3D printing in space and water sanitization. NASA invites the public to participate through social media using #AskNASA and will host an Instagram Q&A.