Hitachi Zosen unveils world's biggest shield tunneling machine

Hitachi Zosen unveils world's biggest shield tunneling machine

OSAKA, Japan - Hitachi Zosen Corp. shows to the press on Dec. 25, 2012, what it claims to be the world's largest shield tunneling machine at its Sakai plant in Osaka Prefecture. The 110-meter-long machine with a diameter of 17.45 meters and weighing some 7,000 tons will be used to drill a 2,800-meter tunnel in Seattle in the U.S. state of Washington to replace an aging elevated highway, the company said.

Olympics: Ayana wins women's 10,000m gold with world record

Olympics: Ayana wins women's 10,000m gold with world record

Ethiopia's Almaz Ayana wins the gold in the women's 10,000 meters in a world-record time of 29:17.45 at the Rio de Janeiro Olympics on Aug. 12, 2016. (Kyodo) ==Kyodo

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Almaz Ayana (L) and Tirunesh Dibaba celebrate with their country's flags as Ayana won the gold medal in the women's 10,000 meters in a world-record time of 29:17.45, while Dibaba captured the bronze at the Rio de Janeiro Olympics on Aug. 12, 2016. (Kyodo) ==Kyodo

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Almaz Ayana smiles with the gold medal she won in the women's 10,000 meters in a world-record time of 29:17.45 at the Rio de Janeiro Olympics on Aug. 12, 2016. (Kyodo) ==Kyodo

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Almaz Ayana wins the gold in the women's 10,000 meters in a world-record time of 29:17.45 at the Rio de Janeiro Olympics on Aug. 12, 2016. (Kyodo) ==Kyodo

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Almaz Ayana wins the gold in the women's 10,000 meters in a world-record time of 29:17.45 at the Rio de Janeiro Olympics on Aug. 12, 2016. (Kyodo) ==Kyodo

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Ayana wins women's 10,000-meter gold with world record

Ethiopia's Almaz Ayana (2nd from R) wins the gold in the women's 10,000 meters in a world-record time of 29:17.45 at the Rio de Janeiro Olympics on Aug. 12, 2016. (Kyodo) ==Kyodo