Patel’s trip to Milan, Italy, coincided with a number of high-profile security events over the weekend. Law enforcement officers shot dead an armed man at Mar-a-Lago, President Donald Trump’s residence in Florida, on Sunday, the Secret Service said, anticipating an investigation that involves the F.B.I. Patel himself posted news of the intrusion on X shortly before his celebration, noting that the bureau is “dedicating all necessary resources” to the investigation.