The commuter plane that crashed into a home near Buffalo, N.Y., was new and had a clean safety record, officials said Friday, leaving investigators few immediate clues about why it suddenly plunged just minutes before its planned landing, killing 50 people. The twin turboprop aircraft — Continental Connection Flight 3407 from Newark, N.J. — was coming in for a landing when it went crashed Thursday night about five miles short of the Buffalo Niagara International Airport
