The deal was meant to bring hope that the end of war is near, but Afghan youth have mixed feelings about the signed agreement.
Iranian Foreign Minister Javad Zarif called it "the dream project of a bankruptcy-ridden real estate developer."
“We don't want to be stuck in the middle of a war again.”
The country's FARC rebels have promised to quit the drug trade, but other groups are ready and waiting to take control.
The biggest hurdle is obtaining public support for the peace agreement in a referendum to be held on October 2, with polls hinting that a Brexit-style upset is possible.
The Revolutionary Armed Forces of Colombia, or FARC, is one of the few remaining remnants of the wave of Marxist-inspired Latin American guerrilla armies that swelled during the Cold War.
Even assuming the final deal is not ready by the March 23 deadline, most observers believe that a peace accord to end 50 years of war with the Revolutionary Armed Forces of Colombia is not far away.
South Sudan President Salva Kiir has signed the deal a week after refusing to do so, but it's not clear that the pact will actually end his country's bloody conflict.
Al Qaeda-linked militants have claimed responsibility for an attack that targeted a compound near the US embassy in Yemen's capital.