"Now available is the August 3, 2016 NASA Future In-Space Operations (FISO) telecon material. The speakers were Chris Sanders (AeroJet Rocketdyne), Mike Fuller (Orbital ATK), and Bob DaLee (Boeing), who discussed "NASA's Space Launch System: Powering the Journey to Mars."
Note: The audio file and presentation are available online and to download.
Marc's note: The future is SLS folks, that's it. Just have a look at slide 9 for the comparison to existing rockets such as SpaceX's Falcon 9 and Falcon Heavy (soon to fly) and ULA's Atlas V and Delta-IV. Oh, and the comparison is to the possible future SLS Block 1B and 2B, neither of which are funded or will be built anytime soon.
Keith's note: And of course what the BoeingLockheedMartinAerojetRocketdyneOrbitalATK guys never, ever mention is cost - what it cost to develop SLS, what each flight costs, what it would take to fund these larger versions of SLS. Yet they compare their rocket with things like Falcon 9 and Falcon Heavy that you can buy - now. How many Falcon Heavy's can you buy for the the cost of one of these SLS vehicles? How many could you buy with what it cost to develop the SLS overall? That question is impossible to answer - since no one knows what SLS actually costs.