The content originally appeared on: Trinidad and Tobago Newsday News On top of mounting tensions between Guyana and Venezuela, one of the Caricom country's military aircraft has gone missing over the disputed Essequibo region. Search-and-rescue operations are under way to locate a Guyana Defence Force (GDF) helicopter that went down near the Venezuelan border during what officials say was a 'border operation.' In a release on Wednesday, the GDF said it is carrying out searches, aided by private-sector aircraft operators. […]