<p>MOSCOW (Reuters) --A Russian Soyuz rocket carrying a research satellite exploded seconds after blast-off, killing one person in a setback that could hit the international space station program, officials said on Wednesday.</p>
<p>The 300-ton unmanned Soyuz-U rocket exploded 29 seconds after take-off from Russia's Arctic Plesetsk cosmodrome late on Tuesday, its blazing debris showering onto the launchpad, an Emergencies Ministry spokesman said.</p>