UNITED NATIONS -- UNITED NATIONS (AP) — President Donald Trump said Tuesday that he believed Ukraine could win back all territory lost to Russia, a dramatic shift from the U.S. leader’s repeated calls for Kyiv to make concessions to end the war.

Right now, though, U.S. leadership appears reticent. Coincidentally or not, the serious airspace violations have happened since Trump’s summit with President Vladimir Putin in Alaska in August, when the U.S. leader dropped his demand for a ceasefire in Ukraine.

France, Germany and Sweden said Monday they will send military personnel and anti-drone systems to Denmark to boost security at this week’s European summits in Copenhagen.

The doctrine proved to be ineffective after Vietnam, but better ideas came with Reagan’s military buildup.

The Trump administration is shifting its tone on the war in Ukraine and considering expanding the weaponry that Ukrainian forces can use to fend off Russia.

From stroking US President Donald Trump's ego to a "Finnish solution" for peace in Ukraine, former NATO chief Jens Stoltenberg opens up about his decade as head of the alliance in a new memoir. He cited as an example Finland,

Germany is putting thousands of troops in Lithuania, a NATO member next to Russia, in its first major long-term deployment abroad since World War II.

More drones spotted in Denmark over military sites as Nato vows to ramp up vigilance - Dozens have been injured in a sustained attack on Kyiv and other parts of Ukraine by Russia