FYI for those that were wondering about flight delays, this from the CDC website (dated yesterday):
If the
first flight in your trip is delayed past the 1-day limit of testing due to a situation outside of your control (e.g., delays because of severe weather or aircraft mechanical problem), and that delay is
24 hours or less past the 1-day limit for testing, you do not need to be retested. If the delay is more than
24 hours past the 1- day limit, then you will need to be retested.
If a
connecting flight in your trip is delayed past the 1-day limit of testing due to a situation outside of your control (e.g., delays because of severe weather or aircraft mechanical problem), and that delay is less than
48 hours past the 1-day limit for testing, you do not need to be retested. If the delay is more than
48 hours past the 1-day limit, then you will need to be retested. (
https://www.cdc.gov/coronavirus/2019-ncov/travelers/testing-international-air-travelers.html)