5 trends tracked about this subject — the full history, oldest to newest below.
The United States designates two additional Mexican cartels, including La Linea and Los Viagras, as foreign terrorist organizations.
Pakistan military operations along the Afghan border have resulted in conflicting reports regarding the number of casualties.
Pakistan security forces report a major cross-border operation resulting in 29 militant deaths along the Afghan frontier.
Russia is constructing new military installations near the Finnish border, sparking debate over NATO security and Russian capabilities.
Heightened security measures are in place along the Swiss-French border as France hosts a G7 summit facing a massive 50,000-person protest.