Zhi Guanglu, deputy director of the China Maritime Search and Rescue Center, speaks during a press conference about the Iranian oil tanker Sanchi, which exploded and sank after a collision in the East China Sea in January, at the Information Office of the Ministry of Transport in Beijing, Thursday, Feb. 1, 2018. Chinese officials say they are still debating whether to try to raise an Iranian oil tanker that sank last month with the loss of all 32 crew members. (AP Photo/Mark Schiefelbein)