Touching down at Sao Paulo Guarulhos International Airport (GRU), it’s impossible to avoid the rows of parked passenger aircraft idled by the COVID-19 pandemic, which continues to rage in parts of Latin America. With the off-tarmac gloom, it’s easy to miss the soon-to-land 737-400SF in bright yellow livery operated by Sideral Linhas Aereas, carrying parcels […]