The preliminary draft text of the joint communique by NATO members following the summit in Washington calls Ukraine's path to joining the alliance "irreversible," CNN reported, citing three informed sources. The question of how firm assurances should be given to Ukraine on its NATO membership has been a key point of discussion among the alliance's 32 members ahead of the summit, which opens today. The draft document could still change, but having such language would send an important signal to Kyiv and Moscow, CNN wrote. One of the network's sources, a U.S. official, said the White House supports the use of the word "irreversible" in the final communique, provided the document also reaffirms that Kyiv's work on democratic reforms will continue.