Album: Steve Reich, WTC 9/11 (Nonesuch Records)

The 10th anniversary of the 9/11 attacks on the US is marked by composer Steve Reich with a piece performed by the Kronos Quartet, triple-tracked, and incorporating recordings of the words of air traffic controllers on duty at the time. Haunting and harrowing, the uncomprehending first reactions are combined with a score both alarming and consoling. Also here, Mallet Quartet (2009) and Dance Patterns (2002), but it is WTC 9/11 which packs the most powerful punch.