The device made it possible to strengthen radio signals and to send them over long distances.

VOA: special.2010.01.31

And mixed economic signals continue to call into question how long it will take for the country to emerge from recession.

VOA: standard.2010.01.06

Myers says North Korea's attitude was probably shaped by the Obama administration's signals that it was willing to engage North Korea on a bilateral basis.

VOA: standard.2009.05.26

So why spend all the money on it?," TV Marti transmits over-the-air signals from an aircraft, the Aero Marti,two satellites, and the Internet to get programming into Cuba.

VOA: standard.2009.06.18

When the search began, a half-century ago, it seemed sensible to assume that as technological civilization increased on a planet, more and more signals would be broadcast into space.

VOA: standard.2010.04.16

A senior U.S.official who spoke to reporters said Iran had sent diplomatic signals that it would respond to the P5+1 offer after its June presidential elections, and that post-election political "mayhem" in that country was probably behind the delay.

VOA: standard.2009.09.11