Ultimates, The (2002 series) #10

Captain America flashes back to an incident during World War II when he defeated a Nazi/Chitauri mission to create a super-weapon and seemingly killed their leader Kleiser. In the present, the Ultimates invade the Chitauri base on Micronesia, but it turns out to be a trap and a nuclear bomb explodes; meanwhile back at the Triskelion, the Chitauri have taken over the complex and Janet is captured by the alien leader, the still-living Herr Kleiser.