In a nutshell, The National Right to Life Committee is a pro-life organization founded in response to the legalization of abortion.  Right to life issues include: abortion, euthanasia, human cloning, medicare, health care reform and infanticide. They advocate pro-life legislation.

Here is a copy of their mission statement:
"The National Right to Life Committee was founded in 1973 in response to a United States Supreme Court decision released on January 22 of that year, legalizing the practice of human abortion in all 50 states, throughout the entire nine months of pregnancy. Prior to that Supreme Court case-- Roe vs. Wade -- the abortion debate had been centered in the legislatures of the states, 17 of which had legalized abortion under some circumstances and 33 of which had voted to continue to protect human life from conception.

In June of 1973, a group of pro-life leaders met in Detroit for the first meeting of a new organization, to be non-sectarian, non- partisan, and to have its board consist of an elected representative from each of the 50 states. These first board members included experts in the fields of science, medicine, medical ethics, constitutional law, and religion.

Since its official beginning at that conference, the National Right to Life Committee has grown to represent over 3000 chapters in all 50 states and the District of Columbia.

The NRLC Board of Directors now consists of a director from each state-- elected to fill the position by the state group-- as well as an internally elected nine- member executive committee and officers, and three "at-large" board positions. NRLC also publishes a monthly newspaper, the National Right to Life News, and has an internal Political Action Committee and Educational Trust Fund.

The National Right to Life Committee has been instrumental in achieving a number of legislative reforms at the national level, including a ban on non-therapeutic experimentation of unborn and newborn babies, a federal conscience clause guaranteeing medical personnel the right to refuse to participate in abortion procedures, and various amendments to appropriations bills which prohibit (or limit) the use of federal funds to subsidize or promote abortions in the United States and overseas.

The ultimate goal of the National Right to Life Committee is to restore legal protection to innocent human life. The primary interest of the National Right to Life Committee and its members has been the abortion controversy; however, it is also concerned with related matters of medical ethics which relate to the right to life issues of euthanasia and infanticide. The Committee does not have a position on issues such as contraception, sex education, capital punishment, and national defense.

In addition to maintaining a lobbying presence at the federal level, NRLC serves as a clearinghouse of information for its state affiliates and local chapters, its individual members, the press, and the public."

For info about Legislation issues: http://www.capwiz.com/nrlc/issues/

I hope this helps!

Here's an interesting pro-life video I found from their site, it could give you a better idea of what NRLC advocates.
http://www.youtube.com/watch?v=V2CaBR3z85c