Complex sentence: Between 2005 and 2007, Dr. Flynn has focused the majority of his time on acquiring, installing, and initializing use of a low-energy electron microscope (LEEM) at MRL, one of only five LEEMs that is currently operational in the United States.
Split into simpler sentences: Between 2005 and 2007, Dr. Flynn has focused the majority of his time on acquiring, installing, and initializing use of a low-energy electron microscope (LEEM) at MRL. This is one of only five LEEMs that is currently operational in the United States.