MELBOURNE, Fla. — A security breach at Orlando Melbourne International Airport prompted a lockdown early Thursday morning. According to an airport official, an unauthorized student pilot boarded a commercial jet. Advertisement The Melbourne Police Department tweeted Thursday morning that the airport is closed, and all flights have been suspended. The lockdown was put in place a little before 5 a.m. The airport is still closed at this time. The person of interest has been apprehended. The airport should re-open soon.