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.
The Delta flight is cheaper. But check a bag at a cost of $25 for the first checked bag each way on Delta, and your total fare climbs to $256 -- more than the cost of the Southwest flight, which includes free first and second checked bags. Add a second checked bag for $35 each way on the Delta flight, and you'll pay a whopping $326.
Passengers on many Delta flights must pay baggage fees to check their bags. The first checked bag for a domestic Delta flight costs travelers $25 as of 2011.verweight & Oversized Bags. Travelers that want to check more than two bags on a Delta domestic flight should be prepared to pay $125 for the third bag. All subsequent bags cost $200 each. All flights to Europe cost $200 per bag after the second bag.