UV light does not just create repairable dimers in DNA bases, it can and does rip DNA apart. Enough exposure would cause more than enough irreparable damage to kill the cell and 99% of the cell being destroyed is certainly not salvageable.
Regional service for the airline is served by Delta Connection. Delta typically charges a fee for all checked bags on domestic flights, with most international flights having an allowance of one or two free checked bags per passenger, depending on destination.
Cardmembers have told us that they value being recognized when they travel with Delta. We believe that this new first checked bag free benefit does just that and more. We're excited to team up with American Express to offer this benefit to SkyMiles Credit Cardmembers, said Jeff Robertson, Vice President - SkyMiles.