The meeting place was not chosen at random: The heads of state and government of the 31 NATO states are meeting today in Vilnius, where the military alliance’s two-day summit begins at noon. The border of Belarus is close by, but it is also not far from the so-called Suwalki Gap. This is the point with the Russian enclave of Kaliningrad, where the alliance is particularly vulnerable. A sign of solidarity and determination should go out from Vilnius in the direction of Moscow.