Nearly 4,200 cruise passengers begin returning home ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Mark Wallheiser/EPA A cruise ship docked in Mobile, Ala., on Thursday after losing power Sunday. Martha Ackley/AP Passengers realized the ATMs had power, so they unplugged the machines and daisy-chained power strips to charge mobile devices while they were stuck at sea. John David Mercer/AP Lower floors of the ship overflowed with sewage, forcing passengers to the deck. Lyle Ratliff/Reuters An engine room fire left the ship adrift in the Gulf of Mexico for four days. G M Andrews/AP James Enmon hugged his aunt Kristi Conn, both of Orange, Texas, after getting off the ship. John David Mercer/AP A passenger displayed a message as he rode a bus from the cruise terminal. John David Mercer/AP One of the travel options for passengers included taking a bus to New Orleans to stay at a hotel before taking a charter flight home. John David Mercer/AP Carnival Cruise Lines CEO Gerry Cahill (left) apologized to guests.