The Atlantic is announcing the addition of five journalists as part of a continued newsroom expansion: senior editor Paul Beckett and staff writer Simon Shuster, both as part of its growing national-security team; Lily Meyer, previously a contributing writer, as a staff writer covering books and culture; Alex Reisner, who covers tech and AI and moves to staff from contributing writer; and Yvonne Wingett Sanchez, who will join as a staff writer covering politics from Arizona.