NEW YORK — Two men were arrested Friday night, a little more than two days before the start of the Republican National Convention, accused of conspiring to bomb a subway station and other high-profile targets here. New York Police Commissioner Raymond Kelly, announcing the arrests at a press conference yesterday, said that the suspects — one a Pakistani national, the other a U.S. citizen — had been under surveillance for a year. The two men, identified as Shahawar Matin Siraj, 21, a Pakistani who lives in Queens, and James El Shafay, 19, a U.S. citizen living on Staten Island, were...