48th Fighter Wing commander, Col. Kyle Robinson has paid tribute to the air crew who died in a helicopter crash in Norfolk.
He said: "The loss of our Liberty Wing brethren is felt deeply across RAF Lakenheath. I can only imagine the hurt and sorrow felt by the family and friends of these Airmen. You are in our hearts and minds.
"We're already feeling a great sense of support from across the Air Force and from our UK neighbours as we go through this difficult period. Thank you for keeping our Airmen and their families in your thoughts and prayers."
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Mladic, now 75, was the military commander of Bosnian Serb forces in the 1990s, who fought against the Bosnian Croat and Bosniak armies.
Weather: Heavy rain and strong winds in the north
His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."