More than 800,000 people passed through U.S. airport checkpoints this past Sunday, the highest since the start of the coronavirus pandemic in mid-March. Shares for major U.S. airlines are also flying higher this week as political support builds for $25 billion in additional federal payroll support for airlines. However, Peter McNally, Global Sector Lead for Industrials, Materials and Energy at Third Bridge, says we should still be concerned despite the recent uptick in traffic.