El Salvador has transformed in the past few years from one of the most-violent countries in Latin America to one of the safest. That's largely due to the intense crackdown on gangs by President Nayib Bukele, who is up for reelection this weekend, and expecting a resounding win. And, Niger, Mali and Burkina Faso are leaving the Economic Community of West African States, known as ECOWAS. All three countries have all experienced military coups in the past few years, and they say the regional trade organization is not helping them fight terrorism. Also, Venezuela and Guyana have been ramping up nationalist propaganda campaigns as a border dispute over the remote Essequibo region, rich in oil and gold, intensifies. Plus, why insects go into the light.