A tsunami travels hundreds of kilometers per hour in deep water.

VOA: special.2009.03.17

A high-speed French train can reach 574 kilometers per hour, but the record was set a Japanese train with a speed of 581 kilometers per hour.

VOA: standard.2010.02.15

Only half the trains in the U.S. can travel up to 170 kilometers per hour, but American trains are about to change, according to U.S.Secretary of Transportation Ray LaHood.

VOA: standard.2010.02.15

"They are all hurtling around in space at 36,000 kilometers per hour and so even a 1mm piece of space junk can destroy or damage a satellite because it all comes from either dead satellites, satellites which have broken up, satellites which had fuel left in them and exploded."

VOA: standard.2010.07.24