President Joe Biden is calling for the release of Navy Veteran Mark Frerichs, a civil engineer who was taken hostage by the Taliban two years ago. “Threatening the safety of Americans or any innocent civilians is always unacceptable, and hostage-taking is an act of particular cruelty and cowardice,” said the president in a statement released over the weekend. “The Taliban must immediately release Mark before it can expect any consideration of its aspirations for legitimacy. This is not negotiable.” Frerichs, a former Navy diver from Illinois, worked in Afghanistan as a civil engineer for a decade. He was kidnapped in January 2020 in the capital of Kabul and is believed to be in the custody of the Taliban-linked Haqqani network. Biden, in his statement, vowed to work “steadfastly” until every American held hostage and wrongfully detained overseas comes home. Charlene Cakora, Frerichs’ sister, issued a statement saying that her family …