The space shuttle Discovery prepares to depart from Kennedy Space Centre in Florida on top of a NASA Shuttle Carrier Aircraft.
It is travelling to its permanent retirement home at the Smithsonian Air and Space Museum's Udvar-Hazy Centre, near Dulles International Airport in Chantilly, Virginia.
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The announcement came a day after a famine was declared in two areas of South Sudan following three years of civil war and severe inflation.
It is unclear what their alleged plans were.
Anti-terror police are currently questioning the men who were arrested at three separate locations in France.