Where have all the Uber and Lyft drivers gone? And, how the pandemic economy is fueling protests and violence in Colombia.Read more:Uber and Lyft are facing major driver shortages, leading to long wait times and more expensive fares. Faiz Siddiqui reports on why this is happening — and what it may mean for the future of these popular ride-hailing apps.Weeks of protests in Colombia have left dozens dead. South America bureau chief Anthony Faiola explains how the pandemic-ravaged economy has led to massive demonstrations across the country and criticism of Colombian police over the use of force.