Two lawsuits have been filed against the Trump administration's ban on transgender service personnel.
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But he leaves his defence secretary to decide whether to retain existing transgender recruits.
Read moreMTV invites transgender troops in America to the Video Music Awards after Donald Trump's military ban.
Read moreThe move to replace Vice Adm Aucoin follows a series of collisions involving US warships in Asia.
Read morePresident Trump made the wrong decision, says Professor Andrew Bacevich of Boston University.
Read moreTen US sailors have been missing since Monday's collision with a tanker near Singapore.
Read moreJonathan Marcus
Diplomatic correspondent
Donald Trump's latest speech means Afghanistan has become his war, writes Jonathan Marcus.
Read moreTen sailors are still missing after the USS John McCain collided with a tanker near Singapore.
Read moreTrump rules out withdrawing from Afghanistan
President Donald Trump has said a hasty US withdrawal from Afghanistan would leave a vacuum for terrorists to fill. He said his original instinct was to pull US forces out, but had instead decided to stay and "fight to win" - avoiding the mistakes made in Iraq. Mr Trump did not set out deadlines for the mission to end but said that it should depend on conditions on the ground. He also warned Pakistan that the US would no longer tolerate the country offering "safe havens" to extremists, saying the country had "much to lose" if it did not side with the Americans. Newsday heard a range of reactions from an Afghan MP (Fawzia Koofi), our correspondent in Washington (Aleem Maqbool), former Vice Chief of Staff of the US Army (General Jack Keane) and the BBC's Iram Abassi in Pakistan. (Photo: President Trump briefs on Afghanistan. Credit: Getty Images)
The inquiry will look at "all related accidents at sea", US Defence Secretary James Mattis says.
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