Mall officials say four out of ten people who visit have traveled long distances.

VOA: special.2010.08.13

The device shows scientists what an object is made of from great distances.

VOA: special.2009.12.30

AM radio can be sent over larger distances, but the quality of the sound is not as good as a later kind of radio signal processing, called frequency modulation.

VOA: special.2010.12.08

The $10-billion U.S.missile defense program involves a combination of systems designed to detect and intercept missiles coming from short,medium and long distances.

VOA: standard.2010.03.26