US Secretary of State John Kerry has called for stability in Egypt during his first visit to the country since President Mohammed Morsi was ousted in July.
Speaking at a news conference, he said: "All of Egypt's future will be defined not only by the way the road map is implemented and the way the constitution is formed but by the economic choices and opportunities that are created over there next weeks and months.
He also stressed the need for fair and transparent trials for all Egyptians.
Kerry's visit comes the day before Morsi and 14 other senior Muslim Brotherhood leaders are due to go on trial charged with inciting violence.
More top news
They made it across a deadly sea this year, but their journey to what they hope will be political asylum had only just begun.
Scientists used modern forensic techniques to review the 'cold case' and determine the victim was probably killed by two blows to the head.
US computer science expert says "endpoint" of lethal drone technology is killer robots that choose targets via artificial intelligence.