Corresponding Atomic Host AMIs are available now for testing:
Fedora-AtomicHost-28-20180425.0.x86_64 us-west-2 ami-35c2aa4d hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 us-west-1 ami-d9a8b5b9 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 us-east-1 ami-1d279162 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 sa-east-1 ami-0eb4e762 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 eu-west-2 ami-3219fa55 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 eu-west-1 ami-09eac670 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 eu-central-1 ami-c2614729 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 ca-central-1 ami-51139235 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 ap-southeast-2 ami-d864aeba hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 ap-southeast-1 ami-32d8f74e hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 ap-south-1 ami-bd3110d2 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 ap-northeast-2 ami-aefc55c0 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 ap-northeast-1 ami-6f12f410 hvm gp2
Fedora-AtomicHost-28-20180425.0.x86_64 us-west-2 ami-f2cda58a hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 us-west-1 ami-85abb6e5 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 us-east-1 ami-393b8d46 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 sa-east-1 ami-eebdee82 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 eu-west-2 ami-f819fa9f hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 eu-west-1 ami-29e8c450 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 eu-central-1 ami-ea614701 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 ca-central-1 ami-d70e8fb3 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 ap-southeast-2 ami-7b65af19 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 ap-southeast-1 ami-4ddbf431 hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 ap-south-1 ami-833110ec hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 ap-northeast-2 ami-70fc551e hvm standard
Fedora-AtomicHost-28-20180425.0.x86_64 ap-northeast-1 ami-cb17f1b4 hvm standard
Thanks,