Earlier today, projects in the US east regions may have been experiencing connectivity problems. This is due to AWS networking issues which should now be resolved. The update from AWS (available at https://status.aws.amazon.com/):
Between 6:23 AM and 6:32 AM PST and between 8:11 AM and 8:21 AM PST, customers in the US-EAST-1 Region may have experienced Internet connectivity issues. The root cause of this issue was a loss of power in one of our network peering facilities. Our network is designed to be fully redundant with multiple independent peering facilities in every region. Some customers experienced elevated latency and packet loss while the network rerouted affected traffic to these unaffected network peering facilities. Some packet loss was also observed as we restored traffic to the affected network peering facility. The issue has been resolved and the service is operating normally.