What’s the biggest challenge facing NASA’s space program?

The most challenging challenge facing the space agency’s human spaceflight program has to do with a few factors: How do we keep people alive in space?

How do people learn and understand their craft and what is the best way to do that?

How can we find ways to keep our astronauts safe while also having a safe place to do so?

These are all questions NASA’s human exploration program faces today.

And they are all going to be questions for many years to come.

But there is one big question that is going to continue to haunt NASA’s exploration programs for a long time to come: How can people learn, understand and use a rocket?

The rockets we have today are not ready to take people anywhere, but they are getting better and better.

We are seeing a lot of progress in this area, and one of the things we are doing to improve the quality of the technology that goes into those rockets is by building a science laboratory to help understand how people can fly safely in space.

One of the ways we’re doing that is by teaching people how to do the science, and I think one of those things is to build a rocket.

And there are several different types of rockets that we’ve built, and there are also different ways to make a rocket and how to get a rocket up to a height that’s capable of going out to space.

In this new video, we’ll be talking to two of the people working on this.

The first person is Mark Coyle, the head of NASA’s Exploration Systems Science Directorate.

He’s in charge of human space exploration, which includes the rocket science, the human exploration technologies and, of course, the space stations.

He joined us from the Kennedy Space Center in Florida.

The second person is Tom Wirth, NASA’s Space Technology Development Center director.

He is in charge, of all of these things, of designing and building rockets, how they are built and how they work.

We’re going to talk to them about their work in space, the future of rockets, and what it is that they are working on.

Welcome, Mark C.

Coyle.

What is the role of a rocket in spaceflight?

What is a rocket’s role?

What kind of science does it do?

And what are the challenges associated with that?MARK C. CODLEY: Well, the role that rockets play in space flight is to carry people and cargo to low-Earth orbit.

They can carry a crew up to 1,200 pounds and they can go up to 8,000 feet, depending on what you’re doing.

And the most important thing for the space station is that it’s not there when you go up, because it is the main launch pad, the primary launch pad.

And so you have to keep that on the ground.

The space station orbits Earth, so the main thing for astronauts is to go up there.

And it’s the most critical launch pad in the world.

So the question is, how do we do that, what’s the best method of getting people up there?

And so, you can do a couple of things.

You can get people up from the surface, which is the most efficient way to get people out of Earth’s atmosphere.

But the problem is that there are no gravity-feedback devices to get them down.

So if you have a launch pad and you’ve got a big launch truck and you’re just dropping people off on the surface and then you get up, you have no way of knowing how fast you’re going.

So, what we do is we have a bunch of rockets sitting in various places around the world and we put people in them and we use those rockets to put people on the space shuttle.

And we have about 60 to 70 rockets that go to the space lab, which launches them to low Earth orbit.

And then, what happens is, when they come back, they are either discarded, they’re reused, or they are stored in different parts of the rocket, like the propulsion module.

So they’re in different places.

They’re in a bunch and there’s nothing we can do to change the fact that the rockets that get launched go to low earth orbit.

So, the problem with that is, we don’t have any sort of way to tell when they are going to come back to Earth.

So you can’t know when they’re going back.

So we have to make decisions about when to use a launch vehicle.

And that’s where a rocket comes in.

And you have two types of rocket: a launch system and a payload system.

The primary payload system is a piece of equipment that is attached to the launch vehicle and is attached by way of parachutes.

So when it comes to landing, it’s attached to that piece of hardware.

The secondary payload system goes on top of the main payload.

And when the primary payload comes back, it is attached in the secondary payload.

So there’s a little bit of

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