BRUSSELS (AP) — President Joe Biden made his entrance at the NATO summit aiming to consult European allies on efforts to counter provocative actions by China and Russia while highlighting the U.S. commitment to the 30-country alliance that was frequently maligned by predecessor Donald Trump.

The summit Monday comes as Biden tries to rally allies for greater coordination in checking China and Russia, two adversaries whose actions on economic and national security fronts have become the chief foreign policy concerns in the early going of the Biden presidency.

Biden shortly after arriving at the alliance’s headquarters sat down with NATO Secretary General Jens Stoltenberg and underscored the U.S. commitment to Article 5 of the alliance charter, which spells out that an attack on one member is an attack on all and is to be met with a collective response.

“Article 5 we take as a sacred obligation,” Biden said. “I want NATO to know America is there.”

The White House said the communique to be signed by alliance members at the end of the NATO summit is expected to include language about updating Article 5 to include major cyber attacks — a matter of growing concern amid a series of hacks targeting the U.S. government and businesses around the globe by Russia-based hackers.

The update will spell out that if an alliance member needs technical or intelligence support in response to a cyber attack, it would be able to invoke the mutual defense provision to receive assistance, according to White House national security adviser Jake Sullivan.

The president started his day meeting with leaders of the Baltic states on NATO’s eastern flank regarding the “threat posed by Russia,” China and the recent air piracy in Belarus, according to Sullivan. He’ll also meet with Turkish President Recep Tayyip Erdogan.

Biden’s itinerary in Europe has been shaped so that he would first gather with Group of Seven leaders for a three-day summit on the craggy shores of Cornwall and then with NATO allies in Brussels before his much-anticipated meeting with Russian President Vladimir Putin in Geneva on Wednesday.

At the G-7, leaders sought to convey that the club of wealthy democracies — Canada, France, Germany, Italy, Japan, the United Kingdom and the United States — is a better friend to poorer nations than authoritarian rivals such as China and Russia.

The G-7 meeting ended with a communique that called out forced labor practices and other human rights violations impacting Uyghur Muslims and other ethnic minorities in the western Xinjiang province. The president declined to discuss private summit negotiations over the provision, but said he was “satisfied” with the communique, although differences remain among the allies about how forcefully to call out Beijing.

Biden is focused on building a more cohesive bond between America and allies who had become wary of U.S. leadership after enduring four years of Trump’s name-calling and frequent invectives about the relevance of multilateral alliances like NATO.

Trump complained that the NATO alliance allows “global freeloading” countries to spend less on military defense at the expense of the U.S. and dismissed the alliance as “obsolete.”

Biden offered a pointed rejoinder on Sunday, saying: “We do not view NATO as a sort of a protection racket. We believe that NATO is vital to our ability to maintain American security for … the remainder of the century. And there’s a real enthusiasm.”

When alliance members last met for a summit in England in December 2019, Trump grabbed headlines by calling Canadian Prime Minister Justin Trudeau “two-faced” and French President Emmanuel Macron “nasty.”

Trump lashed out after Trudeau was caught on a hot mic gossiping with other leaders about Trump turning photo opportunities into long news conferences. Ahead of the summit, Macron had declared NATO “brain dead” because of a void in U.S. leadership under Trump.

Biden has already acknowledged during his Europe tour that the alliance needs to ensure better burden sharing and needs more American leadership. He’s also highlighted NATO members’ contributions in the war in Afghanistan, noting that “NATO stepped up” after America was attacked on Sept. 11, 2001.

The U.S. and the alliance are winding down their involvement in the nearly 20-year war that killed tens of thousands of Afghans and more than 3,500 U.S. and allied troops. The war also raised profound questions about whether NATO’s most ambitious effort was worth it.

For now, NATO plans to leave civilian advisers to help build up government institutions. It’s unclear who will protect them. The alliance is also weighing whether to train Afghan special forces outside the country.

NATO members are also expected to endorse the creation of a new cyber defense policy to improve coordination with countries impacted by the increasing frequency of ransomware attacks, a climate security action plan to reduce greenhouse gases from military activities in line with national commitments under the Paris agreement and a commitment to strengthen NATO’s deterrence to meet threats from Russia and elsewhere, according to the White House.

Biden will meet with Turkey’s president, Erdogan, on the summit sidelines.

Biden has known Erdogan for years but their relationship has frequently been contentious. Biden, during his campaign, drew ire from Turkish officials after he described Erdogan as an “autocrat.” In April, Biden infuriated Ankara by declaring that the Ottoman-era mass killing and deportations of Armenians was “genocide” — a term that U.S. presidents have avoided using.

The two leaders were expected to discuss Syria and Iran as well as what role Turkey can play on Afghanistan following the U.S. troop withdrawal, according to the White House. Also on the agenda: how Washington and Ankara “deal with some of our significant differences on values and human rights and other issues,” Sullivan said.

The unsettled security situation in Libya, as well as overlapping concerns on China and Russia are also expected to be discussed.