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An SLS engine firing. Photo: NASA TV

NASA is planning to re-do a major test of its Space Launch System rocket after the last test didn't go as planned earlier this month.

The big picture: The space agency hopes to launch the first uncrewed flight of the SLS by the end of the year, but having to re-run this test could put that timeline at risk.

Where it stands: NASA is planning to re-run the hot fire test — where the core stage of the rocket is strapped to a pad while its four engines fire — as soon as the last week of February, the agency announced Friday.

  • For the first test, the four engines of the SLS's core stage were expected to light up for eight minutes, but instead, they only fired for about a minute before automatically shutting down.
  • NASA is hoping this re-do of the test will see the core stage fire for at least four minutes, allowing the agency and its lead contractor Boeing to gather more data ahead of its first spaceflight.
  • "Conducting a second hot fire test will allow the team to repeat operations from the first hot fire test and obtain data on how the core stage and the engines perform over a longer period that simulates more activities during the rocket’s launch and ascent," NASA said in a blog post.

What's next: It's not yet clear whether the agency will need to delay the first SLS flight planned for November.

  • Once the second hot fire test is complete, NASA expects it will take about a month to get the rocket ready to ship from Mississippi to Cape Canaveral, Florida.

Go deeper: The next big NASA rocket's time has come

Go deeper

CCP releases two jailed Canadians after Huawei CFO deal with DOJ

Photo: Sheldon Cooper/SOPA Images/LightRocket via Getty Images

Two Canadians imprisoned by the Chinese government for over 1,000 days have been released and are expected to arrive in Canada on Saturday, Prime Minister Justin Trudeau said Friday.

Why it matters: Their release comes hours after Huawei Technologies CFO Meng Wanzhou reached a deal with the U.S. Department of Justice that resolves the criminal charges against her and could pave the way for her to return to China.

Updated 13 hours ago - Politics & Policy

Arizona GOP's private recount of 2020 election confirms Biden's win

Contractors working on behalf of the GOP examine and recount 2020 ballots at Arizona Veterans Memorial Coliseum in Phoenix in May. Photo: Courtney Pedroza/Getty Images

In an odd coda to the 2020 election, private contractors conducting a GOP-commissioned recount in Arizona confirmed President Biden’s win in Maricopa County.

Why it matters: The unofficial, party-driven recount has been heavily covered on cable news as part of former President Trump's continued effort to sow doubt about the election result.

Del Rio bridge camp empty following Haitian migrant surge

A boy bathes himself in a jug of water inside a migrant camp at the U.S.-Mexico border on Sept. 21 in Del Rio, Texas. Photo: John Moore/Getty Images

The last migrants camping under the Del Rio International Bridge, which connects Texas and Mexico, departed on Friday, Homeland Security Secretary Alejandro Mayorkas announced during a White House press briefing.

Driving the news: Thousands of migrants, mostly from Haiti, had arrived to the makeshift camp after crossing the southern border seeking asylum. Roughly 1,800 migrants will now head to U.S. Customs and Border Protection processing centers.