At least 49 people were killed and over 23 injured after a US-Bangla Airlines aircraft on Monday crashed and caught fire at Nepal's Tribhuvan International Airport. The plane, a Bombardier Dash 8 Q400, with 67 passengers and four crew members caught fire after it careened off the runway during landing and crashed into a football ground near the airport. Meanwhile, here we bring you 5 biggest mishaps in last 30 days which have raised questions over the safety of passengers.