By Jeff Mason and Nandita Bose WASHINGTON (Reuters) -President Joe Biden on Wednesday said it is time to change the culture and not just U.S. law to stop violence against women as he celebrated expanded protections for survivors of sexual assault and domestic violence. A day earlier, Biden signed a spending bill that included a renewal of the Violence Against Women Act, which also provides more resources and training programs for law enforcement, among other steps. Every month, an average of 70 women are shot and killed by an intimate partner in the United States, according to a new report htt…