United Airlines flight 112 had to divert and make an emergency landing at Des Moines International Airport in Iowa, on April 26.
The flight, en-route from Chicago to Denver, had to be diverted after the pilots reported strange odor in the cockpit.
The Boeing 737 landed uneventfully. None of the 187 people aboard was harmed.
The cause of odor is under investigation.

An Air India flight made an emergency landing at Biju Patnaik International Airport, Odisha, India, on June 4th.
American Airlines flight AA-1019 made an emergency landing in San Jose, California, on June 8th.
Piedmont Airlines flight PDT-4839 had to return and make an emergency landing in Philadelphia, Pennsylvania, on September 27th.