At a WWI cemetery in France, Biden issues a warning against "semi-isolationism" and emphasizes the value of alliances.

Aisne-Marne American Cemetery is a site former President Donald Trump skipped during his 2018 trip to Paris.

On Sunday, President Joe Biden paid tribute to the thousands of Americans

who lost their lives in World War I at this symbolic location,

warning against a trend of "semi-isolationism" in the US and highlighting the value of alliances.

"It's just not realistic to think that we can avoid getting involved in significant battles in Europe."

After taking part in a wreath-laying ceremony, Biden told reporters, "That's why it's so important that we continue to have the alliances we have,

continue to beef up those alliances, continue to keep NATO strong, and continue to do what we've been able to do for the last-since the end of World War II.