USA TODAY is reporting that former health official Anthony Fauci is scheduled to testify under subpoena Wednesday in a Senate investigation. It said Sen. Rand Paul, R-Kentucky, arranged the hearing to explore whether COVID-19 originated from a Chinese lab, a theory Fauci has previously countered, stating he believes animal-to-human transmission was the most likely source. Ahead of his appearance, more than 1,100 pages of diary entries Fauci kept as director of the National Institute of Allergy and Infectious Diseases were released. The newspaper also reported that Saudi Arabia's defense ministry confirmed its first announced involvement in the war with Iran, joining the U.S. fight with strikes. USA TODAY traveled with the Royal Canadian Mounted Police along the northern border, revealing a different approach to enforcement and questioning President Donald Trump's assertions about its weakness. Separately, activists are defending a century-old cottonwood tree in Lochiel, Arizona, along the U.S.-Mexico border, which Border Patrol intends to remove for the border wall. A historic library on the U.S.-Canada border now requires Canadians to use a backdoor entrance, which the outlet said reflects Trump's redefinition of the relationship with its neighbor. In other news, Texas is experiencing its hottest week of summer, with triple-digit temperatures prompting warnings for heat exhaustion symptoms. The late Senator Lindsey Graham's South Carolina funeral service is set for Wednesday, following a Congressional tribute in Washington where President Donald Trump and other top U.S. officials and lawmakers remembered him. A special primary is underway to fill his Senate seat, with a dozen candidates vying for the Republican nomination. USA TODAY also noted that Ross Douthat and Norah O'Donnell are joining the "60 Minutes" team after Scott Pelley and other staffers were let go under new editor-in-chief Bari Weiss. FIFA announced its aim to raise billions by selling a significant minority stake to private investors, creating a new commercial entity valued at $20 billion. Additionally, translator Emily Wilson, whose 2018 edition of "The Odyssey" influenced Christopher Nolan, criticized the director's film adaptation in a new essay.