Readers criticize the country’s lax gun laws. Also: “The Power Broker” at 50; air-conditioning; phones in school; polluting cruise ships; still summer.

Airlines pledged assistance, refunds and reimbursements to passengers whose travel had been disrupted by this summer’s software outage. Instead, passengers told us, they were on their own.

© Nicole Craine for The New York Times

On our public lands, nobody can pull rank on you. Except a bear.

Readers react to Biden, Netanyahu and the killing of the hostages. Also: Trump and I.V.F.; a gay-Christian alliance; reasons for joy; Disney trips; fancy dorms.