The presidents of the Visegrad Four Central European states have been the most high-profile foreign guests of the event.
Merkel deems Macron's words "drastic" and a "sweeping attack" on the Alliance.
Germany would reach the 2% of GDP defense spending threshold by 2031, instead of 2024, she projects.
Italy's Deputy Prime Minister was given an unusually high-profile welcome in D.C.
The proposed EastMed natural gas pipeline is expected to boost substantially the EU's Southern Gas Corridor.
US and then UN envoy Matthew Nimetz tackled the Greece - Macedonia name dispute for 20 of the 27 years
The administration of US President Donald Trump has turned down a request by the three largest EU member states, Germany,