Biden arrived in Britain on Wednesday on his first trip abroad since taking office, an eight-day mission to rebuild trans-Atlantic ties strained during the Trump era and to reframe relations with Russia.
Biden, speaking at the start of a trip that will include a NATO summit and a meeting with Russian President Vladimir Putin, said he would underscore Washington's "rock solid" commitment to the transatlantic alliance.
"We're not seeking conflict with Russia," the Democratic president told U.S. troops and their families at Royal Air Force Mildenhall. "We want a stable and predictable relationship ... but I've been clear. The United States will respond in a robust and meaningful way if the Russian government engages in harmful activities."