PORT OF SPAIN, Trinidad — After days of multi-agency security investigations into undeclared explosives on board a Ukrainian cargo plane, Trinidad and Tobago’s national aviation authority has granted the aircraft and its crew full clearance to leave the country’s Piarco International Airport. In an official statement released Friday night, the Airports Authority of Trinidad and Tobago (AATT) laid out the full timeline of the incident, which triggered heightened security protocols amid the country’s ongoing State of Emergency.