Colombia has tried peace talks with the Farc before, says Jose Obdulio Gaviria, a former Uribe adviser.

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"You have to look for hooks, how much is contingent versus what you really get, " Mr. Gaviria says.

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Under Mr Gaviria's urging, the government and opposition agreed that new elections would be held by April 8th.

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Yet 24 hours later, Mr Carter and Mr Gaviria found that the counting of signatures had not even begun.

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"We hope this country (the US) at least starts to think there are alternatives, " said former Colombian President Cesar Gaviria.

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But Mr Gaviria says that peace in Colombia arrives in pieces.

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Founders who accept acqui-hire exits often have to agree to concessions, says Ivan Gaviria, a partner with law firm Gunderson Dettmer LLP in Redwood City, Calif.

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Former President Cesar Gaviria is part of the group along a number of experts and academics expected to produce a document with recommendations within eight months.

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Thirty-six hours later, on February 25th as Mr Gaviria was about to return, two powerful bombs were detonated near the Spanish embassy and outside the Colombian consulate.

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In a 2009 report, three former Latin American presidents -- Brazil's Fernando Henrique Cardoso, Colombia's Cesar Gaviria, and Mexico's Ernesto Zedillo -- called for decriminalizing cannabis for personal use.

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