VietNamNet Bridge – Phan Boi Tran, 61, a composites expert, was preparing to test his mini submarine in a swimming pool in 2010, when he heard someone wondering if the vessel would come back up again.

A dramatic series on the life of Vietnamese patriot Phan Boi Chau will be co-produced by Viet Nam Television (VTV) and the Tokyo Broadcasting System (TBS) to air next year