president joe biden is looking ahead to the next era of cooperation with japan and south korea after a historic trilateral summit at camp david friday. the three leaders hope to bolster ties as the u.s. works to counter china's influence in the region and north korea's persistent provocative behavior. >> their political commitments fall short of a formal three-way alliance, but the three leaders vow to consult each other during crises and threats affecting common interest. priscilla alvarez, give us more on the significance of the summit. >> reporter: this is an opportunity for biden to build out the three-way engagement with japan and south korea as they face aggression with north korea as well as military and economic aggression from china. so this was an opportunity for them to open up a new chapter. that's the way that president biden described it. in doing so, they rolled out a