Guest host Bret Baier began with Friday's apparent terror attack in Munich, where a gunman opened fire at a mall. Bill O'Reilly phoned in with his analysis of the spate of attacks in Europe. "Terrorism is a contagion," Bill said, "and we are now seeing it start to break out like the Bubonic Plague all over Europe. It isn't organized or directed by ISIS leaders, but there is a strain running through this. The gunmen killing innocent children are losers with nothing to live for, that's the one thing they all have in common. There's really nothing you can do about it on a case-by-case basis, but the failure to contain ISIS has lit this fuse and we are paying a price for that. It's not just the risk of Islamists, but also the backlash from the far right. There is a civil war brewing throughout Europe!" Bill also linked the global terrorism problem to domestic politics. "Millions of refugees have fled the Middle East and streamed into the open border society of Europe, disrupting life in every way. This is why Donald Trump has been so successful with his message that we will not allow open borders here. But there is evil in America, Trump is tapping in to that, and he has a very good chance of winning this election."

Bret welcomed Fox News correspondents Jennifer Griffin and Carl Cameron at the very moment that Hillary Clinton's campaign sent out a long-anticipated announcement. "It's now official," Griffin reported from Florida, "that Senator Tim Kaine is Hillary Clinton's pick for vice president. We just learned that Hillary Clinton called Tim Kaine and then she spoke with the president." Carl Cameron, still in Cleveland, analyzed the politics of the selection. "He's from Virginia, which is an important swing state, and he is a proven vote-getter. He is also a long-time Democratic operative and he has a lot of friends. There are aspects of Tim Kaine that will complement the ticket, and there are not a lot of liabilities." Bret added some additional details about Senator Kaine: "He is a Catholic and a former missionary who personally opposes abortion. He is down the middle on a lot of issues and if Mike Pence is a safe Republican, Tim Kaine is a safe and centrist Democrat."

For more on the Tim Kaine announcement, Bret turned to FNC's James Rosen and Brit Hume. "This problem that Hillary Clinton has with the left wing of her party," Rosen theorized, "has been in evidence for this entire primary cycle when Bernie Sanders was able to draw extraordinary crowds of young people. Tim Kaine is not going to do anything, I don't think, to ameliorate those problems for Hillary Clinton in her own party." But Hume contended that this is an astute move toward the political center "It's a safe pick, there is nothing abrasive about Tim Kaine. His record is certainly more conservative than Hillary Clinton's and way more conservative than Bernie Sanders', but he is a liberal. He's a very personable, easy-going, likeable guy and I think he will serve her well." Back in Cleveland, Carl Cameron pointed out that Senator Kaine has at times been at odds with Hillary Clinton and has also disagreed with President Obama on occasion.

Bret spoke about the selection of Tim Kaine with Democratic Congresswoman Debbie Dingell of Michigan. "I think this is great," she declared. "Tim Kaine is one of the most decent people I have ever met and he has all kinds of experience. He is strong and tough, he speaks Spanish, and he's one of the most able and caring people I know." Dingell brushed off the notion that the Democratic Party's far left wing will be unhappy with Tim Kaine's centrist record. "He's a bridge-builder," she said, "and he knows how to work with everybody. We do not have the kind of rift within the Democratic Party that the Republican Party has!"

Bret returned the focus to Friday's terrorism in Germany, reporting, "Munich's police chief now says the shooter was an 18-year-old German-Iranian from Munich who apparently used a pistol and committed suicide." Bret then spoke on the phone with London Times correspondent Allan Hall, who reported live from Munich. "Things are calming down a little," Hall said, "but police have not given up on looking for more suspects. There are 2,300 police vehicles in action at the moment and there is the fear that this gunman may be supported by a wider network." Terror expert James Sisco added his perspective. "You don't have to be a counter-terrorism expert," he began, "to understand what is happening in Europe and the United States. The current strategies are failing, they merely treat the symptoms and do not address the disease. This is being amplified by the refugee crisis and the polarization of entire societies. It's not unfathomable to see that there will be a rise in these type of events in Europe and the United States." Counter-terrorism specialist Aaron Cohen laid the blame squarely at the feet of German Chancellor Angela Merkel and her liberal immigration policies. "We are seeing a massive security failure that begins with Angela Merkel. Last year she let in 40,000 to 60,000 Syrian and Iraqi immigrants and she has now bolstered that to about 1.5-million total immigrants in Berlin alone. The only security check they went through was a fingerprint and a photo."

Brit Hume and James Rosen returned to analyze the possible impact of yet another terror attack in Europe. "This feeds into the sense," Hume said, "that we are a people in danger and a Western world in danger. To many people that underscores the validity of Donald Trump's appeal. The question is whether there will be more of this, it does not seem to be stopping!" Rosen added that escalating terrorism has been a stain on President Obama's presidency. "President Obama's eight years are almost up and the verdict will soon be in. One verdict will surely be, whatever his successes, that he was just not up to the threat that metastasized on his watch, which was radical Islamic jihadist terrorism. According to the Rand Corporation, on President Obama's watch the sheer number of radical Islamic groups grew by 58%. The mass shootings here at home, the attacks on police, and the attacks across Europe conflate into a sense of deep insecurity."