At present, one can find it and start an instance using the AMI by going to the EC2 dashboard and then clicking on AMIs tab on the left and then searching "BCE-spring-2015" under "Public Images".
But if one directly from the dashboard clicks on Launch, then at Step 1 of "Choose an AMI", BCE is not listed under the Ubuntu images under Community.
ck37
commented
9 years ago 
At present, one can find it and start an instance using the AMI by going to the EC2 dashboard and then clicking on AMIs tab on the left and then searching "BCE-spring-2015" under "Public Images".
But if one directly from the dashboard clicks on Launch, then at Step 1 of "Choose an AMI", BCE is not listed under the Ubuntu images under Community.