8. Argentinian navy searching for lost submarine
The Argentinian Navy is searching for a missing submarine in the Atlantic Ocean.
The ARA San Juan has 44 crew members. The last confirmed location of the diesel-electric-propelled submarine was 430 kilometers off Argentina's Atlantic coast on Wednesday.
The navy says emergency signals believed to have come from the vessel were detected 7 times.
US and Brazilian planes are helping with the search.
A navy official says they have searched about 80 percent of the area, but have not been able to contact the vessel.
President Mauricio Macri wrote on Twitter that his government will do whatever is necessary to find the submarine as soon as possible.