China continues nuclear buildup, has strengthened ties to Russia, Defense Dept report says

China is continuing its nuclear expansion, is strengthening its ties with Russia, and has increased military pressure against Taiwan over the past year, according to a new Defense Department report that examines actions accelerating key areas of conflict with the U.S.

The report, released Wednesday, also noted that the recent rash of corruption allegations within China's powerful Central Military Commission, which oversees the People's Liberation Army, is hurting Beijing's military growth and could slow its modernization campaign.

A senior defense official said China has made progress in some of its programs but slid back in others.