At a vigil Sunday in Dayton, the crowd began to sing “Amazing Grace” as they mourned the nine lost in the senseless tragedy.
In El Paso, thousands lit up their cellphones to honor the 22 lives lost in Saturday's massacre at Walmart.
So many cars remained abandoned Monday in the El Paso Walmart parking lot, left behind by victims and other shoppers fleeing for their lives.
But there was also anger across the country as the governor of Ohio was drowned out by a crowd chanting, "Do something."
Grammy award-winning singer Kacey Musgraves echoed that sentiment at Lollapalooza in Chicago.
“Somebody f***ing do something,” the singer told the crowd inside Grant Park Sunday. “I can't even believe that we're having to process the s*** that's happening in the last 24 hours, much less everything that's happened in the last 215 days in America.
She added: "I don't know what the answer is but obviously something has to be f***king done.”
Calls for action also came on a soccer field in the nation's capital, as soccer star Alejandro Bedoya grabbed a microphone after scoring a goal for Philadelphia Union as they placed against D.C. United Sunday.
"Hey Congress, do something now, end gun violence, let's go!" he screamed into a mic.