President Donald Trump closed the week mourning the death of conservative activist Charlie Kirk, and honoring those who were lost in the 9/11 terrorist attacks.Kirk, 31, was assassinated during his "American Comeback Tour" at Utah Valley University on Wednesday. His death comes a year after two assassination attempts against Trump."To my fellow Americans, I am filled with grief and anger at the heinous assassination of Charlie Kirk on a college campus in Utah," Trump said in a video address to the nation on Wednesday, hours after announcing Kirks death.BASEBALL FANS PAY TRIBUTE TO CHARLIE KIRK AT YANKEES-TIGERS GAME"Charlie inspired millions and tonight, all who knew him and loved him are united in shock and horror," Trump said. "Charlie was a patriot who devoted his life to the cause of open debate and the country that he loved so much, the United States of America. He fought for liberty, democracy, justice and the American people. Hes a martyr for truth and freedom, and theres never been anyone who was so respected by youth."Trump said in an interview with "Fox & Friends" on Friday that an arrest had been made in connection with Kirks assassination, and Utah officials confirmed the suspect as 22-year-old Tyler Robinson."I hope he's going to be found guilty, I would imagine. And I hope he gets the death penalty," Trump said Friday. "What he did, Charlie Kirk was the finest person, he didn't deserve this. He worked so hard and so well. Everybody liked him."'DARK MOMENT FOR AMERICA': TRUMP DECLARES CHARLIE KIRK'S VOICE 'BIGGER AND GRANDER' AFTER ASSASSINATIONTrump also commemorated the 24th anniversary of the 9/11 terror attacks at the Pentagon and in New York City on Thursday. Trump, along with first lady Melania Trump, visited the Pentagon on Thursday morning to remember the 2,977 lives lost in the attacks."This morning, we recall the light of Americas best and bravest and the love that they showed in their final moments," Trump said.TRUMP ARRIVES AT YANKEE STADIUM, GIVES SPEECH TO TEAM AHEAD OF 9/11 ANNIVERSARY GAMELate on Thursday, Trump headed to New York and visited the Yankees home clubhouse, before being seated in a suite by the third base side with Yankees team owner Hal Steinbrenner and president Randy Levine. "USA" chants broke out before and after the anthem at the game.Trump hasnt attended a baseball game since the 2021 World Series.Fox News Ryan Morik contributed to this report.