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.
Delta Airlines (DL) will charge $200.00 USD extra for bags that are from 63 to 115 linear inches or from 160 to 292 centimeters on U S domestic flights. Bags greater than 115 linear inches or 292 centimeters will not be accepted as checked baggage / hold luggage.