Tonight, the first American Pope gives his first mass in English.

Pope Leo's historic homily, what he said to the faithful gathered celebrating his new papacy,

plus what we've learned about how he consolidated support to beat out the competition,

what American Cardinals are saying, and why many were looking for someone to follow in Pope Francis's past.

The politics of the pontiff, what he said about the environment, immigration, and more.

And how will he work with the White House? And from Chicago land to Peru, we travel to trace Pope

Leo's roots, our team reporting from across the planet tonight. Newark Airport losing radar displays

again the urgent air traffic control radio call demanding more pressure on officials as delays

stretched to four hours. The showdown at an ICE detention facility as Democratic lawmakers

say they're doing oversight and DHS says they broke in, a major

city mayor arrested. Plus, a federal judge orders a tough student to be released after being detained.

Keith Morrison's exclusive new reporting, the record showing Brian Coburger looked up photos, videos,

and news days after the Idaho student murders.

This is NBC Nightly News. Reporting tonight from the Vatican, here is Lester Holt.

Good evening and welcome from a city, still a glow after yesterday's electrifying introduction of a new head of the Catholic

Church, Pope Leo, or Papa Leone, as they call him here in Italy, quickly endearing himself

among the faithful, leading his first mass as Pope this morning in the Sistine Chapel, where only

hours earlier the conclave that saw him elected as Pope ended. Born in the United

States, a first for a pope, a surprise choice to many, but not for the Cardinals who elected him,

many revealing it was barely a factor in their discussions that preceded the votes.

Tonight, we're getting glimpses surrounding the largely secretive conclave process,

including what guided their decision-making and how they got to know each other.

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