Qatar Airways thinks leisure and visiting friends and relatives traffic will rebound this summer, and it thinks it has the right fleet for the moment. And Eurowings is betting the same, planning its first routes in Europe than don't go through its home base in Germany. But the virus is surging in Europe, and the pace of vaccinations worldwide may not be keeping up with airlines' hopes. Edward "Ned" Russell and Madhu Unnikrishnan dive into these topics and into why Wall Street is betting big on Frontier Airlines' stock market debut.   Get daily updates at airlineweekly.com to better understand the industry.