President Obama will suspend his trip to Asia this week to attend a memorial for those killed at Fort Hood, a White House official said this weekend.

The 10-day trip, which will take the president to Japan, Singapore, China and South Korea, will now begin on Thursday, not Wednesday as originally anticipated. The memorial will take place on Tuesday at the military base, The Associated Press reported on Monday.

Meanwhile, momentum is building on Capitol Hill for an official inquiry into the massacre, which left 13 dead and countless wounded. Sen. Joe Lieberman (I-Conn.) on Sunday even went so far as to say last week's shooting was "the worst terrorist attack since 9/11," and he promised Fox News he would hold a congressional hearing to determine suspected shooter Maj. Nidal Malik Hasan's motives.