[mikeash]

At this point, the landings seem like one of the least likely things to go wrong. Which is pretty amazing.

[mabbo]

I'm a little worried about the two nearly synchronized landings not far from each other. Any interference between them and... well, we'd get a fireworks show.

[sandworm101]

No doubt they will return via two different paths with a degree of vertical/temporal separation. Landing them in parrallel is just asking for trouble.