Since then, NASA has been forced to rely exclusively on Russia's increasingly expensive Soyuz spaceships to get to the International Space Station (ISS), in which the United States government has invested about $100 billion.
Earlier this year, NASA said the two companies would conduct unmanned tests flight in August.
Dreier said it's unlikely Congress would reverse itself one year later and cut the NASA science programs, especially as the Republican-controlled chamber is seeking to pass a budget with minimal partisan fighting over relatively small expenditures.
In its report, the GAO said NASA's projected "average" certification date for Boeing was December 2019, and January 2020 for SpaceX, with the potential for both companies to slip well into 2020. Coupled with the technical challenges inherent in any human spaceflight development program, the systems have been repeatedly delayed and NASA's dependence on Russian Federation extended. Under the Barack Obama administration, NASA's Earth Science program saw its biggest growth spurt, and this was because of climate change and the anthropogenic causes of climate change, according to the American Association for the Advancement of Science.
If those uncrewed missions go well, Boeing and SpaceX will each follow with two crewed flights in 2019. Experts believe that with the latest complications, the first uncrewed flight test will take place at the end of 2018 - the beginning in 2019 and the manned flight test will take place in mid-2019. His remarks were widely reported and Boeing spokeswoman Rebecca Regan confirmed the news via email to SpacePolicyOnline.com.
Trump team wants to roll back Obama-era mileage standards
And when they fail they are prohibitively expensive to fix and often require someone akin to a rocket scientist to troubleshoot. Those assertions are refuted by thousands of pages of data the Obama administration used in developing the regulation.
On Friday, NASA plans to announce the eight astronauts who will fly either SpaceX's Crew Dragon or Boeing's CST-100 Starliner ships for the first time.
More than 50 people are in NASA's astronaut corps, though 12 in the agency's 2017 astronaut class are still training.
SpaceX designed its Crew Dragon spacecraft to launch atop the company's Falcon 9 rocket from historic Launch Complex 39A at NASA's Kennedy Space Center in Florida. Surprisingly, only 3.0 percent of adults in the survey said NASA's top focus should be sending astronauts to the moon, while a mere 8.0 percent said a human trip to Mars or other planets should be a top priority.
John Mulholland, a Boeing vice president who's program manager for the CST-100 Starliner program, laid out the revised schedule today during a teleconference with journalists.
NASA plans to announce its final decision on the crews - two astronauts for each of the four crewed test flights - on Friday morning.