WASHINGTON, D.C. — Congress is taking another shot at ending clock changes as a bipartisan effort gains momentum. For generations, Americans have spent two weekends each year changing the clocks, springing forward in March and falling back in November. Now, Congress is once again debating whether to end the practice for good. A provision tucked inside a major transportation bill being considered by the U.S. House would permanently "lock the clock," ending the twice-yearly time changes.