Pope Francis was mid-sentence about the importance of the Golden Rule when cheering started, and stopped him.
"If we want security, let us give security," Pope Francis said just now.
"The yardstick that we use for others will be the yardstick which time uses for us," he said.
Big applause for pope's mention of how we must protect "human life at every stage of development."
He said how business "can be a fruitful source of prosperity... as an essential part of its service to the common good."
"This common good also includes the earth, a central theme of the encyclical which I recently wrote in order to 'enter into dialogue with all people about our common home,'" Pope Francis just said.
Climate change talk going on now:
"I call for a courageous and responsible effort to redirect our steps, and to avert the most serious effects of the environmental deterioration caused by human activity. I am convinced that we can make a difference," he said.
From ABC News' Ali Weinberg, who spotted a moment:
The pool cameras trained on Rep. John Lewis, who as a college-aged civil rights leader, helped lead an orderly march across the Edmund Pettus Bridge in Selma, Alabama, as Pope Francis read this line: “Here too I think of the march which Martin Luther King led from Selma to Montgomery fifty years ago as part of the campaign to fulfill his “dream” of full civil and political rights for African Americans.”
Lewis was visibly moved, as his neighbors sitting next to him rubbed his shoulders proudly.
"It is my duty to build bridges and to help all men and women, in any way possible, to do the same. When countries which have been at odds resume the path of dialogue – a dialogue which may have been interrupted for the most legitimate of reasons – new opportunities open up for all."
Speaking against war:
"Here we have to ask ourselves: Why are deadly weapons being sold to those who plan to inflict untold suffering on individuals and society? Sadly, the answer, as we all know, is simply for money: money that is drenched in blood, often innocent blood."
Summary of why he selected the four specific Americans to highlight in his speech:
"Martin Luther King, liberty in plurality and non-exclusion; Dorothy Day, social justice and the rights of persons; and Thomas Merton, the capacity for dialogue and openness to God."
From ABC News' David Wright, who was outside with the crowd of tens of thousands of people gathered on the lawn during the speech:
Just beyond the security barrier, an eclectic crowd is gathered here on the national mall.
Environmental groups have set up jumbotrons for people to watch and the atmosphere is a bit like a music festival but a bit more political and religious.
The crowd includes monks in robes, mothers, college kids church groups of every denomination and others. Bernie Sanders for President volunteers are passing out leaflets. These people share a concern for environment but also are here because of Francis' message of social justice.
Pope Francis is now making his way through Statuary Hall.
Next stop: the balcony. Pope Francis will go out and see-- and perhaps address-- the crowd of upwards of 50,000 people who have gathered along the Mall.
On the balcony: Nancy Pelosi, Harry Reid, Mitch McConnell, Joe Biden, John Boehner and others
False alarm, not in English.
But he said he's excited to see "the most important ones here: children!"
Boehner's handkerchief makes another appearance.
Closing line in English:
"Thank you, thank you very much, and God Bless America!"
One final wave before Pope Francis heads back inside.
The pope has now exited the building, shaking hands with Nancy Pelosi, Biden, and several others before heading out.
Timing note: Pope Francis was two minutes ahead of schedule when he left the nunciature this morning, but now he's running late. He was scheduled to arrive at the Charitable Center of St. Patrick's Church and meeting with the homeless at 11:15 but he's already behind.
Pope Francis has now arrived at St. Patrick Parish, the oldest Catholic church in Washington D.C., and laid flowers.
He's now addressing the crowd in Spanish, but noted that the crowd is going to hear a few statements-- one in Spanish and one in English.
"Like St Joseph, you may ask why are we homeless without a place to live?" Pope Francis says, while reflecting on how the Bible says that the Holy family was not allowed in when they were looking for a place to stay.
From ABC News' Ali Weinberg in Washington:
There was apparently a Biden-hot-mic incident in Statuary hall today.
After Pope Francis finished his remarks on the Speaker’s Balcony, Vice President Joe Biden can be seen and heard praising him.
“They love you. And we love you,” Biden told him.
The pope gave the group a blessing and ended by saying "and please, don't forget to pray for me."
From ABC News' Serena Marshall who is outside of St. Patrick's Church, near where he's set to have lunch:
Blessed food and now throngs of people rushing from seats to him. Lots of phones out.
We can't see him through the crowds that have formed where we're standing even though he is only 10 feet away
From ABC News' Brionna Jimerson in New York:
Day and Merton may be trending, but let's not forget who this visit is all about.
The two biggest hashtags being used throughout Pope Francis' visit are #PopeInDC and #PopeInUS, with their accompanying emojis.
As of 11:30 a.m. this morning, shortly after he wrapped up his speech to Congress, #PopeInDC had 96,719 mentions and #PopeInUS had 25,167.