The phone of the co-pilot of Malaysia Airlines Flight 370 was on and made contact with a cell tower in Malaysia about the time the plane disappeared from radar, a U.S. official told CNN on Monday. However, the U.S. official — who cited information shared by Malaysian investigators — said there was no evidence the co-pilot, Fariq Abdul Hamid, had tried to make a call. The official told CNN’s Pamela Brown on Monday that a cell-phone tower in Penang, Malaysia — about 250 miles from where the flight’s transponder last sent a signal — detected the co-pilot’s phone searching for...