Israeli warplanes flying over Lebanon launched missiles at a Syrian regime airbase in the desert east of the city of Homs. Israel has attacked an Iranian command-and-control center at the airbase back in February. The attack on T-4, or Tiyas, was not related to the Saturday Syrian army chemical weapons attack against civilian neighborhood in the town of Douma. Rather, it is part of an on-going, intensifying Israeli campaign against the growing Iranian military presence in Syria.

Future members of the Red Army Faction – aka the Baader-Meinhof gang — committed their first known attack on 2 April 1968, when two Frankfurt department stores were hit with arson. The RAF dissolved in 1998, but many questions are still unanswered. Three former members of the Red Army Faction are still on the run. A series of robberies in the late 1990s put the authorities back on their trail. These thefts served no apparent political goal: Their only purpose was to finance the fugitives’ lives on the run.

Anti-Semitism is once again a serious concern in Europe. Incidents are rising in several countries. Violent attacks, assaults and vandalism against the French Jewish community are making headlines nearly every day. Earlier this week, Jews in the United Kingdom took to the streets to protest deep-seated anti-Semitism in the Labor Party and the failure of political leaders on the left, including Labor Party leader Jeremy Corbyn, to adequately address their concerns. ADL offers an assessment of the current situation in nine European countries.

Only a week after the terrorist attacks of September 11, 2001, envelopes containing anthrax spores were sent to several media companies and two senators. As a result, twenty-two people were infected and five died. Since these incidents, the U.S. has increased its efforts on measures countering bioterrorism. That incident stemmed from spores sent to individuals and offices where the reach was somewhat contained. Imagine if the spores had been taken onto a mass transit platform — like the subway. A subway incident can bring a whole city to a halt, and the effects can last much longer in the form of lingering fear and mistrust.

Increasingly, schools are turning to active shooter drills and videos to prepare students and staff to face a gunman. As a sociologist who studies the social impacts of security strategies, I am concerned about the unintended ethical and political consequences of these exercises.

Twenty-three Russian diplomats who were ordered out of Britain in response to the poisoning of a former spy with a deadly nerve agent are leaving the Britain. In addition to expelling the Russian diplomats, Britain has suspended high-level bilateral contacts with Moscow and announced that British ministers and the royal family will not attend the soccer World Cup in Russia this summer.

An emergent type of conflict in recent years has been coined “gray zone,” because it sits in a nebulous area between peace and conventional warfare. Gray-zone action is not openly declared or defined, it’s slower, and is prosecuted more subtly—using social, psychological, religious, information, cyber and other means to achieve physical or cognitive objectives with or without violence. The lack of clarity of intent—the grayness—makes it challenging to detect, characterize, and counter an enemy fighting this way. DARPA launches a new program called COMPASS, to develop software that would help clarify enemy intent by gauging an adversary’s responses to various stimuli.

Argentina’s former president Cristina Fernandez de Kirchner will go to trial on charges that she participated in the cover-up of Iranian officials involved in the 1994 terror attack in a Jewish community center in Buenos Aires. In a 26-page ruling by Judge Claudio Bonadio, the former president and eleven former government officials were ordered to stand trial and were accused of the cover-up and abuse of power. One of those officials is ex-foreign minister Hector Timerman.

British investigators have announced that a “nerve agent” was used in an attempt to murder Russian former spy Sergei Skripal in Salisbury on 4 March. But they have not specified what nerve agent was used in the attack. Alastair Hay, a professor of environmental toxicology and a member of the British government’s advisory group on chemical warfare agents, said about the likely source of the toxic substance: “I think it’s more a case in which we are talking about a military capability. If you are a diligent chemist, you will find procedures for making sarin and tabun and various other chemical agents. But there’s the complexity in making it and how efficient the reaction is. And, of course, there is the risk of exposure in making something, too. So containment to make sure that the laboratory person is not exposed is absolutely crucial. So I think, really, what one is looking at here is probably more a military-type manufacture. But again, we just have to wait and see.”