Vadim, like many other Russians, has relatives in Ukraine. Four years ago, as Russian troops besieged the city in the Sumy region where his cousins lived, he checked in with them regularly to ask about their safety. Now, they are the ones checking in with him. As Ukraine ramps up a campaign of long-range strikes on Russia, the war arrived this week for Vadim, if not on his doorstep, then on his roof. An exploding Ukrainian drone struck the top floor of his high-rise in the Moscow suburb of