World at War: In a messy escalation of war in the Middle East, Turkey has shot down a Russian fighter jet that it says flew over Turkish territory despite repeated warnings. Russia has confirmed that it lost an Su24 fighter jet, but says it never strayed from Syrian airspace.

It’s the first time since the 1950s that a member of NATO has shot down a Russian aircraft. Turkey had warned Russia in recent weeks about flying over Turkey.

Turkey says the Russian plane was shot down by its patrolling F-16 fighters. A Turkish statement said, “The plane was warned 10 times in the space of 5 minutes before it was taken down.” Russia has described it as “a very serious incident.”

The Politics of War: French president Francois Hollande comes to the US today to meet with President Obama and lobby for a coalition to wage an all-out fight against the Islamic State. Obama has been criticized even within his own party and administration for not being more aggressive.

Hollande moves on to Moscow after the US as he tries to build an alliance in one of the modern world’s most oddly multi-faceted wars.

On the other side of the equation, Russian President Vladimir Putin met with Iran’s Ayatollah Ali Khamene to strengthen an alliance to prop up the regime of Syria’s Bashar al-Assad, which is also fighting ISIS. But in this case, the enemy of our enemy is not our friend.

The Hunt: A street cleaner in Brussels found a discarded suicide vest in a pile of trash not far from where authorities had tracked the cellphone of the suspect Salah Abdeslam. The vest was described as similar to the vests used in the Paris attacks, packed with the same kind of explosives and bolts for shrapnel.

Travel Alert: On the brink of Thanksgiving and Christmas, the US has issued a travel alert. Citing threats from the Islamic State, al-Qaeda, and Boko Haram, the warning says, “U.S. citizens should exercise vigilance when in public places or using transportation.” It goes on, “Exercise particular caution during the holiday season and at holiday festivals or events.”

The Biz Page: Pfizer and Allergan have reached a $155 billion agreement to merge and create the biggest drug conglomerate in the world. They expect to rake in $65 billion a year while cutting $2 billion in costs. The new Pfizer would stake its flag in Ireland, where the corporate tax rate is about 18 percent as opposed to 25 percent in the US.

The War at Home: Florida Sen. Marco Rubio has released his first presidential television commercial in which he stirs the fear over terrorism in Europe and the Middle East. “This is a civilizational struggle between the values of freedom and liberty, and radical Islamic terror,” Rubio says. “What happened in Paris could happen here. There is no middle ground. These aren’t disgruntled or dis-empowered people. These are radical terrorists who want to kill us, because we let women drive, because we let girls go to school … Either they win or we do.”

Rubio managed to deliver the whole thing without stopping for a drink of water.

The Obit Page: Adele Mailer, the second wife of author Norman Mailer who was famously wounded by her husband’s knife rather than his pen, has died at age 90. Norman once stabbed Adele during a drunken party that was typical of their carousing and stormy marriage. Adele later wrote in her memoir, “I decided I was going to be that beautiful temptress who ate men alive, flossed her teeth and spit out the bones, wearing an endless supply of costumes by Frederick’s of Hollywood.”

Political Corrections: A free Yoga class at the University of Ottawa in Canada has been shut down after complaints that the yoga group was an unacceptable “cultural appropriation” of a non-Western practice.

Instructor Jennifer Scharf received a complaint saying that because yoga is taken from people who “have experienced oppression, cultural genocide and diasporas due to colonialism and western supremacy… we need to be mindful of this and how we express ourselves while practicing yoga.”

The Student Federation shut down the class. Sources close to the Romano say Italian students are organizing to get spaghetti banned from the dining halls.