Cross border security is at serious risk. So are the lives of the people who live there.
A 2016 accord with the FARC guerrillas was supposed to end Colombia's 52-year civil war. But a deadly car bomb in Bogotá shows that armed insurgents still threaten the South American country.
Strikes and rallies have gripped Colombia for months. That's bad news for its new government but a sign of progress in a country that had little tolerance for dissent during its 52-year civil war.
In the most peaceful election in their modern history, Colombians have elected as their next president a conservative who will renegotiate the country's fragile 2016 accord with the FARC guerrillas.
The Colombian government has learned the hard way that simply explaining a complex deal to people won't win them over.
Two candidates from Colombia's May 27 presidential vote will face off on June 17. One is a former guerrilla. The other is a hard-liner. Their views for the nation's future couldn't be more different.
As reports of crimes against humanity mount, Colombia's post-conflict justice system is still moving desperately slowly.
A former FARC rebel commander-turned- presidential candidate has withdrawn from Colombia's 2018 election. Despite increased violence, the peace accord he signed will probably survive this setback.
One of Colombia's most beautiful areas, El Cocuy National Natural Park was for years too dangerous to visit. No more.
Some of the crucial mechanisms meant to deliver peace in Colombia have yet to be set up.
Now the war is over, academia has a special role to play in securing the peace.
A court decision securing last year's peace deal and a new ceasefire have invigorated Colombia's peace process, but there are plenty of ways it could still go wrong.
It seems the culprits in a "cash-for-kills" scheme that claimed thousands of lives might find a way to wriggle out of the peace process.
Meet the Commoners' Alternative Revolutionary Force, Colombia's newest political party. To move beyond its violent past, the new FARC will need a charismatic leader who can win over voters.
The last time the FARC joined in democratic politics, thousands of its members and leaders were murdered. Will this time be different?
It is a delicate – and dangerous – moment for one of the world's most ecologically important nations.
Ending violence is only a first step. Research from Colombian universities sheds light on the role of education in peace-building.
Demilitarised female guerrillas in Colombia are hoping to spark a new women's movement based in the FARC's revolutionary ideals.
The world will be watching the country's courts.
Delays in setting up disarmament camps for former guerillas have cast doubt on the Colombian government's commitment to peace. But the real problem is its national history.