Handshakes. In normal circumstances, they’re a perfectly natural greeting. However, put them in a politically-charged environment, and they can almost immediately become embarrassingly uncomfortable. Just ask U.S. President Barack Obama, right, who appeared to have been left hanging as he extends his hand to Russian president Vladimir Putin during their meeting at the United Nations General Assembly in New York City on Sept. 28, 2015. Here, we round up the most awkward political handshakes.