passport renewal

My USA passport is coming up for renewal in a few months. I won't be heading back to the USA anytime soon. Is it easy to renew at the USA embassy in Buenos Aires?

I need to renew my US passport. Every time I access the US Embassy online scheduling system, there are no appointments available. It does show FULLY BOOKED appointment dates, however, I never see any AVAILABLE appointment dates. I try the system several times a day, all week long. When I call...