Turkish Airlines flight TK-623 had to return and make an emergency landing in Istanbul, Turkey, on May 15th.
The Boeing 737-900 plane took off for Abuja, Nigeria, but had to return shortly afterwards after the crew failed to retract landing gear.
The plane landed safely. All passengers and crew members remained unharmed.


American Airlines flight AA-671 made an emergency landing at Nellis Air Force Base, Nevada, on February 16th.
KLM flight KL-1705 had to return after taking off from Amsterdam, Netherlands, on September 21st.
