To other analysts the delay between CRA rule changes (in 1995) and the explosion of subprime lending is not surprising, and does not exonerate the CRA. They contend that there were two, connected causes to the crisis: the relaxation of underwriting standards in 1995 and the ultra-low interest rates initiated by the Federal Reserve after the terrorist attack on September 11, 2001. Both causes had to be in place before the crisis could take place. Critics also point out that publicly announced CRA loan commitments were massive, totaling $4.5 trillion in the years between 1994 and 2007. They also argue that the Federal Reserve’s classification of CRA loans as “prime” is based on the faulty and self-serving assumption that high-interest-rate loans (3 percentage points over average) equal “subprime” loans.