A JetBlue plane departing from Boston had to make an emergency landing Monday afternoon.Officials with the Federal Aviation Administration said JetBlue Flight 877, on its way to Las Vegas, reported that it struck birds after it took off from Logan Airport. >> Download the FREE WMUR appThe FAA said the crew declared an emergency and that the flight is making a return to Logan Airport. The plane had yet to land as of 5 p.m. Monday.