By Gram Slattery, Jonathan Landay and Humeyra Pamuk WASHINGTON, Jan 20 (Reuters) - The United States plans to reduce the number of personnel it has stationed within several key NATO command centers, a move that could intensify concerns in Europe about Washington's commitment to the alliance,

The Trump administration has repeatedly said the U.S. should be in control of Greenland, which is part of Denmark and NATO.

“It’s very disrespectful.”

The operation, Steadfast Dart, comes as President Trump has been accused of undermining the alliance and will be watched closely to see how well the allies manage without their most important partner.

Tensions between Iran and the United States remain high. Security planners are closely watching Iran’s missile arsenal and overall missile capabilities. Iran cannot strike the US mainland. However, its ballistic and cruise missiles can threaten US forces across the Middle East.

Fact check: US contributions to Nato and Green Party bar chart claim - Round-up of fact checks from the last week compiled by Full Fact.

NATO has protected American lives through the Cold War, the long struggle against terrorism, and every major crisis of the modern era.

U.S. president’s swipe at NATO troops in Afghanistan mark latest challenge to alliance.

In the midst of this, one crucial actor is hiding in plain sight. The U.S. Congress bears responsibility for reinforcing constitutional guardrails on the Trump administration’s policy toward NATO, with respect to both Greenland and to safeguarding our intertwined economic and security interests.

France has been skeptical of over-reliance on US leadership in NATO. Macron push for a more sovereign Europe bolstered by unity against US coercion.