What: Ariana Afghan Airlines Boeing 727-200 en route from Kabul to Kandahar to Mashad
Where: en route
When: May 9th 2010
Why: While en route, a passenger began kicking a cabin window and broke through one pane and attempted to open the emergency exit before he was subdued. He had tried to bring a knife aboard but was confiscated at the gate. After attacking the plane, security took him into custody and escorted him to the back of the plane.
The flight landed landed safely in Kandahar where the window-kicker was taken into custody.
Southwest Airlines flight WN-528 had to return and make a safe emergency landing at Baltimore–Washington International Airport, Maryland, on July 18th.
The 737 was parked at gate B37 Terminal 4. 
Ryanair flight FR-9056 had to divert and make an emergency landing in Hamburg, Germany, on September 1st.
American Airlines flight AA-2293 returned to Dallas/Fort Worth International Airport, Texas, on September 29th.
United Airlines flight UA-1516 had to return and make an emergency landing in Liberia, Costa Rica, on April 24th.
LATAM flight LA-705 made a safe emergency landing at Adolfo Suárez Madrid–Barajas Airport, Madrid, Spain, on June 29th.